1. 28 Sep, 2019 11 commits
    • Linus Torvalds's avatar
      Merge branch 'hugepage-fallbacks' (hugepatch patches from David Rientjes) · edf445ad
      Linus Torvalds authored
      Merge hugepage allocation updates from David Rientjes:
       "We (mostly Linus, Andrea, and myself) have been discussing offlist how
        to implement a sane default allocation strategy for hugepages on NUMA
        With these reverts in place, the page allocator will happily allocate
        a remote hugepage immediately rather than try to make a local hugepage
        available. This incurs a substantial performance degradation when
        memory compaction would have otherwise made a local hugepage
        This series reverts those reverts and attempts to propose a more sane
        default allocation strategy specifically for hugepages. Andrea
        acknowledges this is likely to fix the swap storms that he originally
        reported that resulted in the patches that removed __GFP_THISNODE from
        hugepage allocations.
        The immediate goal is to return 5.3 to the behavior the kernel has
        implemented over the past several years so that remote hugepages are
        not immediately allocated when local hugepages could have been made
        available because the increased access latency is untenable.
        The next goal is to introduce a sane default allocation strategy for
        hugepages allocations in general regardless of the configuration of
        the system so that we prevent thrashing of local memory when
        compaction is unlikely to succeed and can prefer remote hugepages over
        remote native pages when the local node is low on memory."
      Note on timing: this reverts the hugepage VM behavior changes that got
      introduced fairly late in the 5.3 cycle, and that fixed a huge
      performance regression for certain loads that had been around since
      Andrea had this note:
       "The regression of 4.18 was that it was taking hours to start a VM
        where 3.10 was only taking a few seconds, I reported all the details
        on lkml when it was finally tracked down in August 2018.
        __GFP_THISNODE in MADV_HUGEPAGE made the above enterprise vfio
        workload degrade like in the "current upstream" above. And it still
        would have been that bad as above until 5.3-rc5"
      where the bad behavior ends up happening as you fill up a local node,
      and without that change, you'd get into the nasty swap storm behavior
      due to compaction working overtime to make room for more memory on the
      As a result 5.3 got the two performance fix reverts in rc5.
      However, David Rientjes then noted that those performance fixes in turn
      regressed performance for other loads - although not quite to the same
      degree.  He suggested reverting the reverts and instead replacing them
      with two small changes to how hugepage allocations are done (patch
      descriptions rephrased by me):
       - "avoid expensive reclaim when compaction may not succeed": just admit
         that the allocation failed when you're trying to allocate a huge-page
         and compaction wasn't successful.
       - "allow hugepage fallback to remote nodes when madvised": when that
         node-local huge-page allocation failed, retry without forcing the
         local node.
      but by then I judged it too late to replace the fixes for a 5.3 release.
      So 5.3 was released with behavior that harked back to the pre-4.18 logic.
      But now we're in the merge window for 5.4, and we can see if this
      alternate model fixes not just the horrendous swap storm behavior, but
      also restores the performance regression that the late reverts caused.
      Fingers crossed.
      * emailed patches from David Rientjes <rientjes@google.com>:
        mm, page_alloc: allow hugepage fallback to remote nodes when madvised
        mm, page_alloc: avoid expensive reclaim when compaction may not succeed
        Revert "Revert "Revert "mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask""
        Revert "Revert "mm, thp: restore node-local hugepage allocations""
    • David Rientjes's avatar
      mm, page_alloc: allow hugepage fallback to remote nodes when madvised · 76e654cc
      David Rientjes authored
      For systems configured to always try hard to allocate transparent
      hugepages (thp defrag setting of "always") or for memory that has been
      explicitly madvised to MADV_HUGEPAGE, it is often better to fallback to
      remote memory to allocate the hugepage if the local allocation fails
      The point is to allow the initial call to __alloc_pages_node() to attempt
      to defragment local memory to make a hugepage available, if possible,
      rather than immediately fallback to remote memory.  Local hugepages will
      always have a better access latency than remote (huge)pages, so an attempt
      to make a hugepage available locally is always preferred.
      If memory compaction cannot be successful locally, however, it is likely
      better to fallback to remote memory.  This could take on two forms: either
      allow immediate fallback to remote memory or do per-zone watermark checks.
      It would be possible to fallback only when per-zone watermarks fail for
      order-0 memory, since that would require local reclaim for all subsequent
      faults so remote huge allocation is likely better than thrashing the local
      zone for large workloads.
      In this case, it is assumed that because the system is configured to try
      hard to allocate hugepages or the vma is advised to explicitly want to try
      hard for hugepages that remote allocation is better when local allocation
      and memory compaction have both failed.
      Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Michal Hocko <mhocko@suse.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
      Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • David Rientjes's avatar
      mm, page_alloc: avoid expensive reclaim when compaction may not succeed · b39d0ee2
      David Rientjes authored
      Memory compaction has a couple significant drawbacks as the allocation
      order increases, specifically:
       - isolate_freepages() is responsible for finding free pages to use as
         migration targets and is implemented as a linear scan of memory
         starting at the end of a zone,
       - failing order-0 watermark checks in memory compaction does not account
         for how far below the watermarks the zone actually is: to enable
         migration, there must be *some* free memory available.  Per the above,
         watermarks are not always suffficient if isolate_freepages() cannot
         find the free memory but it could require hundreds of MBs of reclaim to
         even reach this threshold (read: potentially very expensive reclaim with
         no indication compaction can be successful), and
       - if compaction at this order has failed recently so that it does not even
         run as a result of deferred compaction, looping through reclaim can often
         be pointless.
      For hugepage allocations, these are quite substantial drawbacks because
      these are very high order allocations (order-9 on x86) and falling back to
      doing reclaim can potentially be *very* expensive without any indication
      that compaction would even be successful.
      Reclaim itself is unlikely to free entire pageblocks and certainly no
      reliance should be put on it to do so in isolation (recall lumpy reclaim).
      This means we should avoid reclaim and simply fail hugepage allocation if
      compaction is deferred.
      It is also not helpful to thrash a zone by doing excessive reclaim if
      compaction may not be able to access that memory.  If order-0 watermarks
      fail and the allocation order is sufficiently large, it is likely better
      to fail the allocation rather than thrashing the zone.
      Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Michal Hocko <mhocko@suse.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
      Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • David Rientjes's avatar
      Revert "Revert "Revert "mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask"" · 19deb769
      David Rientjes authored
      This reverts commit 92717d42.
      Since commit a8282608
       ("Revert "mm, thp: restore node-local hugepage
      allocations"") is reverted in this series, it is better to restore the
      previous 5.2 behavior between the thp allocation and the page allocator
      rather than to attempt any consolidation or cleanup for a policy that is
      now reverted.  It's less risky during an rc cycle and subsequent patches
      in this series further modify the same policy that the pre-5.3 behavior
      Consolidation and cleanup can be done subsequent to a sane default page
      allocation strategy, so this patch reverts a cleanup done on a strategy
      that is now reverted and thus is the least risky option.
      Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Michal Hocko <mhocko@suse.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
      Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • David Rientjes's avatar
      Revert "Revert "mm, thp: restore node-local hugepage allocations"" · ac79f78d
      David Rientjes authored
      This reverts commit a8282608
      The commit references the original intended semantic for MADV_HUGEPAGE
      which has subsequently taken on three unique purposes:
       - enables or disables thp for a range of memory depending on the system's
         config (is thp "enabled" set to "always" or "madvise"),
       - determines the synchronous compaction behavior for thp allocations at
         fault (is thp "defrag" set to "always", "defer+madvise", or "madvise"),
       - reverts a previous MADV_NOHUGEPAGE (there is no madvise mode to only
         clear previous hugepage advice).
      These are the three purposes that currently exist in 5.2 and over the
      past several years that userspace has been written around.  Adding a
      NUMA locality preference adds a fourth dimension to an already conflated
      advice mode.
      Based on the semantic that MADV_HUGEPAGE has provided over the past
      several years, there exist workloads that use the tunable based on these
      principles: specifically that the allocation should attempt to
      defragment a local node before falling back.  It is agreed that remote
      hugepages typically (but not always) have a better access latency than
      remote native pages, although on Naples this is at parity for
      The revert commit that this patch reverts allows hugepage allocation to
      immediately allocate remotely when local memory is fragmented.  This is
      contrary to the semantic of MADV_HUGEPAGE over the past several years:
      that is, memory compaction should be attempted locally before falling
      The performance degradation of remote hugepages over local hugepages on
      Rome, for example, is 53.5% increased access latency.  For this reason,
      the goal is to revert back to the 5.2 and previous behavior that would
      attempt local defragmentation before falling back.  With the patch that
      is reverted by this patch, we see performance degradations at the tail
      because the allocator happily allocates the remote hugepage rather than
      even attempting to make a local hugepage available.
      zone_reclaim_mode is not a solution to this problem since it does not
      only impact hugepage allocations but rather changes the memory
      allocation strategy for *all* page allocations.
      Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
      Cc: Andrea Arcangeli <aarcange@redhat.com>
      Cc: Michal Hocko <mhocko@suse.com>
      Cc: Mel Gorman <mgorman@suse.de>
      Cc: Vlastimil Babka <vbabka@suse.cz>
      Cc: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
      Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · a2953204
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
       "An assortment of fixes that were either missed by me, or didn't arrive
        quite in time for the first v5.4 pull.
         - Most notable is a fix for an issue with tlbie (broadcast TLB
           invalidation) on Power9, when using the Radix MMU. The tlbie can
           race with an mtpid (move to PID register, essentially MMU context
           switch) on another thread of the core, which can cause stores to
           continue to go to a page after it's unmapped.
         - A fix in our KVM code to add a missing barrier, the lack of which
           has been observed to cause missed IPIs and subsequently stuck CPUs
           in the host.
         - A change to the way we initialise PCR (Processor Compatibility
           Register) to make it forward compatible with future CPUs.
         - On some older PowerVM systems our H_BLOCK_REMOVE support could
           oops, fix it to detect such systems and fallback to the old
           invalidation method.
         - A fix for an oops seen on some machines when using KASAN on 32-bit.
         - A handful of other minor fixes, and two new selftests.
        Thanks to: Alistair Popple, Aneesh Kumar K.V, Christophe Leroy,
        Gustavo Romero, Joel Stanley, Jordan Niethe, Laurent Dufour, Michael
        Roth, Oliver O'Halloran"
      * tag 'powerpc-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/eeh: Fix eeh eeh_debugfs_break_device() with SRIOV devices
        powerpc/nvdimm: use H_SCM_QUERY hcall on H_OVERLAP error
        powerpc/nvdimm: Use HCALL error as the return value
        selftests/powerpc: Add test case for tlbie vs mtpidr ordering issue
        powerpc/mm: Fixup tlbie vs mtpidr/mtlpidr ordering issue on POWER9
        powerpc/book3s64/radix: Rename CPU_FTR_P9_TLBIE_BUG feature flag
        powerpc/book3s64/mm: Don't do tlbie fixup for some hardware revisions
        powerpc/pseries: Call H_BLOCK_REMOVE when supported
        powerpc/pseries: Read TLB Block Invalidate Characteristics
        KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag
        powerpc/mm: Fix an Oops in kasan_mmu_init()
        powerpc/mm: Add a helper to select PAGE_KERNEL_RO or PAGE_READONLY
        powerpc/64s: Set reserved PCR bits
        powerpc: Fix definition of PCR bits to work with old binutils
        powerpc/book3s64/radix: Remove WARN_ON in destroy_context()
        powerpc/tm: Add tm-poison test
    • Linus Torvalds's avatar
      Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · f19e00ee
      Linus Torvalds authored
      Pull x86 fix from Ingo Molnar:
       "A kexec fix for the case when GCC_PLUGIN_STACKLEAK=y is enabled"
      * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        x86/purgatory: Disable the stackleak GCC plugin for the purgatory
    • Linus Torvalds's avatar
      Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 9c5efe9a
      Linus Torvalds authored
      Pull scheduler fixes from Ingo Molnar:
       - Apply a number of membarrier related fixes and cleanups, which fixes
         a use-after-free race in the membarrier code
       - Introduce proper RCU protection for tasks on the runqueue - to get
         rid of the subtle task_rcu_dereference() interface that was easy to
         get wrong
       - Misc fixes, but also an EAS speedup
      * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        sched/fair: Avoid redundant EAS calculation
        sched/core: Remove double update_max_interval() call on CPU startup
        sched/core: Fix preempt_schedule() interrupt return comment
        sched/fair: Fix -Wunused-but-set-variable warnings
        sched/core: Fix migration to invalid CPU in __set_cpus_allowed_ptr()
        sched/membarrier: Return -ENOMEM to userspace on memory allocation failure
        sched/membarrier: Skip IPIs when mm->mm_users == 1
        selftests, sched/membarrier: Add multi-threaded test
        sched/membarrier: Fix p->mm->membarrier_state racy load
        sched/membarrier: Call sync_core only before usermode for same mm
        sched/membarrier: Remove redundant check
        sched/membarrier: Fix private expedited registration check
        tasks, sched/core: RCUify the assignment of rq->curr
        tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code
        tasks, sched/core: Ensure tasks are available for a grace period after leaving the runqueue
        tasks: Add a count of task RCU users
        sched/core: Convert vcpu_is_preempted() from macro to an inline function
        sched/fair: Remove unused cfs_rq_clock_task() function
    • Linus Torvalds's avatar
      Merge branch 'next-lockdown' of... · aefcf2f4
      Linus Torvalds authored
      Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
      Pull kernel lockdown mode from James Morris:
       "This is the latest iteration of the kernel lockdown patchset, from
        Matthew Garrett, David Howells and others.
        From the original description:
          This patchset introduces an optional kernel lockdown feature,
          intended to strengthen the boundary between UID 0 and the kernel.
          When enabled, various pieces of kernel functionality are restricted.
          Applications that rely on low-level access to either hardware or the
          kernel may cease working as a result - therefore this should not be
          enabled without appropriate evaluation beforehand.
          The majority of mainstream distributions have been carrying variants
          of this patchset for many years now, so there's value in providing a
          doesn't meet every distribution requirement, but gets us much closer
          to not requiring external patches.
        There are two major changes since this was last proposed for mainline:
         - Separating lockdown from EFI secure boot. Background discussion is
           covered here: https://lwn.net/Articles/751061/
         -  Implementation as an LSM, with a default stackable lockdown LSM
            module. This allows the lockdown feature to be policy-driven,
            rather than encoding an implicit policy within the mechanism.
        The new locked_down LSM hook is provided to allow LSMs to make a
        policy decision around whether kernel functionality that would allow
        tampering with or examining the runtime state of the kernel should be
        The included lockdown LSM provides an implementation with a simple
        policy intended for general purpose use. This policy provides a coarse
        level of granularity, controllable via the kernel command line:
        Enable the kernel lockdown feature. If set to integrity, kernel features
        that allow userland to modify the running kernel are disabled. If set to
        confidentiality, kernel features that allow userland to extract
        confidential information from the kernel are also disabled.
        This may also be controlled via /sys/kernel/security/lockdown and
        overriden by kernel configuration.
        New or existing LSMs may implement finer-grained controls of the
        lockdown features. Refer to the lockdown_reason documentation in
        include/linux/security.h for details.
        The lockdown feature has had signficant design feedback and review
        across many subsystems. This code has been in linux-next for some
        weeks, with a few fixes applied along the way.
        Stephen Rothwell noted that commit 9d1f8be5 ("bpf: Restrict bpf
        when kernel lockdown is in confidentiality mode") is missing a
        Signed-off-by from its author. Matthew responded that he is providing
        this under category (c) of the DCO"
      * 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (31 commits)
        kexec: Fix file verification on S390
        security: constify some arrays in lockdown LSM
        lockdown: Print current->comm in restriction messages
        efi: Restrict efivar_ssdt_load when the kernel is locked down
        tracefs: Restrict tracefs when the kernel is locked down
        debugfs: Restrict debugfs when the kernel is locked down
        kexec: Allow kexec_file() with appropriate IMA policy when locked down
        lockdown: Lock down perf when in confidentiality mode
        bpf: Restrict bpf when kernel lockdown is in confidentiality mode
        lockdown: Lock down tracing and perf kprobes when in confidentiality mode
        lockdown: Lock down /proc/kcore
        x86/mmiotrace: Lock down the testmmiotrace module
        lockdown: Lock down module params that specify hardware parameters (eg. ioport)
        lockdown: Lock down TIOCSSERIAL
        lockdown: Prohibit PCMCIA CIS storage when the kernel is locked down
        acpi: Disable ACPI table override if the kernel is locked down
        acpi: Ignore acpi_rsdp kernel param when the kernel has been locked down
        ACPI: Limit access to custom_method when the kernel is locked down
        x86/msr: Restrict MSR access when the kernel is locked down
        x86: Lock down IO port access when the kernel is locked down
    • Linus Torvalds's avatar
      Merge branch 'next-integrity' of... · f1f2f614
      Linus Torvalds authored
      Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
      Pull integrity updates from Mimi Zohar:
       "The major feature in this time is IMA support for measuring and
        appraising appended file signatures. In addition are a couple of bug
        fixes and code cleanup to use struct_size().
        In addition to the PE/COFF and IMA xattr signatures, the kexec kernel
        image may be signed with an appended signature, using the same
        scripts/sign-file tool that is used to sign kernel modules.
        Similarly, the initramfs may contain an appended signature.
        This contained a lot of refactoring of the existing appended signature
        verification code, so that IMA could retain the existing framework of
        calculating the file hash once, storing it in the IMA measurement list
        and extending the TPM, verifying the file's integrity based on a file
        hash or signature (eg. xattrs), and adding an audit record containing
        the file hash, all based on policy. (The IMA support for appended
    • Linus Torvalds's avatar
      Merge tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux · 298fb76a
      Linus Torvalds authored
      Pull nfsd updates from Bruce Fields:
         - Add a new knfsd file cache, so that we don't have to open and close
           on each (NFSv2/v3) READ or WRITE. This can speed up read and write
           in some cases. It also replaces our readahead cache.
         - Prevent silent data loss on write errors, by treating write errors
           like server reboots for the purposes of write caching, thus forcing
           clients to resend their writes.
         - Tweak the code that allocates sessions to be more forgiving, so
           that NFSv4.1 mounts are less likely to hang when a server already
           has a lot of clients.
         - Eliminate an arbitrary limit on NFSv4 ACL sizes; they should now be
           limited only by the backend filesystem and the maximum RPC size.
         - Allow the server to enforce use of the correct kerberos credentials
           when a client reclaims state after a reboot.
        And some miscellaneous smaller bugfixes and cleanup"
      * tag 'nfsd-5.4' of git://linux-nfs.org/~bfields/linux: (34 commits)
        sunrpc: clean up indentation issue
        nfsd: fix nfs read eof detection
        nfsd: Make nfsd_reset_boot_verifier_locked static
        nfsd: degraded slot-count more gracefully as allocation nears exhaustion.
        nfsd: handle drc over-allocation gracefully.
        nfsd: add support for upcall version 2
        nfsd: add a "GetVersion" upcall for nfsdcld
        nfsd: Reset the boot verifier on all write I/O errors
        nfsd: Don't garbage collect files that might contain write errors
        nfsd: Support the server resetting the boot verifier
        nfsd: nfsd_file cache entries should be per net namespace
        nfsd: eliminate an unnecessary acl size limit
        Deprecate nfsd fault injection
        nfsd: remove duplicated include from filecache.c
        nfsd: Fix the documentation for svcxdr_tmpalloc()
        nfsd: Fix up some unused variable warnings
        nfsd: close cached files prior to a REMOVE or RENAME that would replace target
        nfsd: rip out the raparms cache
        nfsd: have nfsd_test_lock use the nfsd_file cache
        nfsd: hook up nfs4_preprocess_stateid_op to the nfsd_file cache
  2. 27 Sep, 2019 15 commits
    • Linus Torvalds's avatar
      Merge tag 'virtio-fs-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse · 8f744bde
      Linus Torvalds authored
      Pull fuse virtio-fs support from Miklos Szeredi:
       "Virtio-fs allows exporting directory trees on the host and mounting
        them in guest(s).
        This isn't actually a new filesystem, but a glue layer between the
        fuse filesystem and a virtio based back-end.
        It's similar in functionality to the existing virtio-9p solution, but
        significantly faster in benchmarks and has better POSIX compliance.
        Further permformance improvements can be achieved by sharing the page
        cache between host and guest, allowing for faster I/O and reduced
        memory use.
        Kata Containers have been including the out-of-tree virtio-fs (with
        the shared page cache patches as well) since version 1.7 as an
        experimental feature. They have been active in development and plan to
        switch from virtio-9p to virtio-fs as their default solution. There
        has been interest from other sources as well.
        The userspace infrastructure is slated to be merged into qemu once the
        kernel part hits mainline.
        This was developed by Vivek Goyal, Dave Gilbert and Stefan Hajnoczi"
      * tag 'virtio-fs-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
        virtio-fs: add virtiofs filesystem
        virtio-fs: add Documentation/filesystems/virtiofs.rst
        fuse: reserve values for mapping protocol
    • Linus Torvalds's avatar
      Merge tag '9p-for-5.4' of git://github.com/martinetd/linux · 9977b1a7
      Linus Torvalds authored
      Pull 9p updates from Dominique Martinet:
       "Some of the usual small fixes and cleanup.
        Small fixes all around:
         - avoid overlayfs copy-up for PRIVATE mmaps
         - KUMSAN uninitialized warning for transport error
         - one syzbot memory leak fix in 9p cache
         - internal API cleanup for v9fs_fill_super"
      * tag '9p-for-5.4' of git://github.com/martinetd/linux:
        9p/vfs_super.c: Remove unused parameter data in v9fs_fill_super
        9p/cache.c: Fix memory leak in v9fs_cache_session_get_cookie
        9p: Transport error uninitialized
        9p: avoid attaching writeback_fid on mmap with type PRIVATE
    • Linus Torvalds's avatar
      Merge tag 'riscv/for-v5.4-rc1-b' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux · 568d850e
      Linus Torvalds authored
      Pull more RISC-V updates from Paul Walmsley:
       "Some additional RISC-V updates.
        This includes one significant fix:
         - Prevent interrupts from being unconditionally re-enabled during
           exception handling if they were disabled in the context in which
           the exception occurred
        Also a few other fixes:
         - Fix a build error when sparse memory support is manually enabled
         - Prevent CPUs beyond CONFIG_NR_CPUS from being enabled in early boot
        And a few minor improvements:
         - DT improvements: in the FU540 SoC DT files, improve U-Boot
           compatibility by adding an "ethernet0" alias, drop an unnecessary
           property from the DT files, and add support for the PWM device
         - KVM preparation: add a KVM-related macro for future RISC-V KVM
           support, and export some symbols required to build KVM support as
         - defconfig additions: build more drivers by default for QEMU
      * tag 'riscv/for-v5.4-rc1-b' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
        riscv: Avoid interrupts being erroneously enabled in handle_exception()
        riscv: dts: sifive: Drop "clock-frequency" property of cpu nodes
        riscv: dts: sifive: Add ethernet0 to the aliases node
        RISC-V: Export kernel symbols for kvm
        KVM: RISC-V: Add KVM_REG_RISCV for ONE_REG interface
        arch/riscv: disable excess harts before picking main boot hart
        RISC-V: Enable VIRTIO drivers in RV64 and RV32 defconfig
        RISC-V: Fix building error when CONFIG_SPARSEMEM_MANUAL=y
        riscv: dts: Add DT support for SiFive FU540 PWM driver
    • Linus Torvalds's avatar
      Merge tag 'nios2-v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2 · 70570a64
      Linus Torvalds authored
      Pull nios2 fix from Ley Foon Tan:
       "Make sure the command line buffer is NUL-terminated"
      * tag 'nios2-v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
        nios2: force the string buffer NULL-terminated
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 8bbe0dec
      Linus Torvalds authored
      Pull more KVM updates from Paolo Bonzini:
       "x86 KVM changes:
         - The usual accuracy improvements for nested virtualization
         - The usual round of code cleanups from Sean
         - Added back optimizations that were prematurely removed in 5.2 (the
           bare minimum needed to fix the regression was in 5.3-rc8, here
           comes the rest)
         - Support for UMWAIT/UMONITOR/TPAUSE
         - Direct L2->L0 TLB flushing when L0 is Hyper-V and L1 is KVM
         - Tell Windows guests if SMT is disabled on the host
         - More accurate detection of vmexit cost
         - Revert a pvqspinlock pessimization"
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (56 commits)
        KVM: nVMX: cleanup and fix host 64-bit mode checks
        KVM: vmx: fix build warnings in hv_enable_direct_tlbflush() on i386
        KVM: x86: Don't check kvm_rebooting in __kvm_handle_fault_on_reboot()
        KVM: x86: Drop ____kvm_handle_fault_on_reboot()
        KVM: VMX: Add error handling to VMREAD helper
        KVM: VMX: Optimize VMX instruction error and fault handling
        KVM: x86: Check kvm_rebooting in kvm_spurious_fault()
        KVM: selftests: fix ucall on x86
        Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"
        kvm: nvmx: limit atomic switch MSRs
        kvm: svm: Intercept RDPRU
        kvm: x86: Add "significant index" flag to a few CPUID leaves
        KVM: x86/mmu: Skip invalid pages during zapping iff root_count is zero
        KVM: x86/mmu: Explicitly track only a single invalid mmu generation
        KVM: x86/mmu: Revert "KVM: x86/mmu: Remove is_obsolete() call"
        KVM: x86/mmu: Revert "Revert "KVM: MMU: reclaim the zapped-obsolete page first""
        KVM: x86/mmu: Revert "Revert "KVM: MMU: collapse TLB flushes when zap all pages""
        KVM: x86/mmu: Revert "Revert "KVM: MMU: zap pages in batch""
        KVM: x86/mmu: Revert "Revert "KVM: MMU: add tracepoint for kvm_mmu_invalidate_all_pages""
        KVM: x86/mmu: Revert "Revert "KVM: MMU: show mmu_valid_gen in shadow page related tracepoints""
    • Linus Torvalds's avatar
      Merge tag 'pwm/for-5.4-rc1' of... · e37e3bc7
      Linus Torvalds authored
      Merge tag 'pwm/for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
      Pull pwm updates from Thierry Reding:
       "Besides one new driver being added for the PWM controller found in
        various Spreadtrum SoCs, this series of changes brings a slew of,
        mostly minor, fixes and cleanups for existing drivers, as well as some
        enhancements to the core code.
        Lastly, Uwe is added to the PWM subsystem entry of the MAINTAINERS
        file, making official his role as a reviewer"
      * tag 'pwm/for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (34 commits)
        MAINTAINERS: Add myself as reviewer for the PWM subsystem
        MAINTAINERS: Add patchwork link for PWM entry
        MAINTAINERS: Add a selection of PWM related keywords to the PWM entry
        pwm: mediatek: Add MT7629 compatible string
        dt-bindings: pwm: Update bindings for MT7629 SoC
        pwm: mediatek: Update license and switch to SPDX tag
        pwm: mediatek: Use pwm_mediatek as common prefix
        pwm: mediatek: Allocate the clks array dynamically
        pwm: mediatek: Remove the has_clks field
        pwm: mediatek: Drop the check for of_device_get_match_data()
        pwm: atmel: Consolidate driver data initialization
        pwm: atmel: Remove unneeded check for match data
        pwm: atmel: Remove platform_device_id and use only dt bindings
        pwm: stm32-lp: Add check in case requested period cannot be achieved
        pwm: Ensure pwm_apply_state() doesn't modify the state argument
        pwm: fsl-ftm: Don't update the state for the caller of pwm_apply_state()
        pwm: sun4i: Don't update the state for the caller of pwm_apply_state()
        pwm: rockchip: Don't update the state for the caller of pwm_apply_state()
        pwm: Let pwm_get_state() return the last implemented state
        pwm: Introduce local struct pwm_chip in pwm_apply_state()
    • Linus Torvalds's avatar
      Merge tag 'for-5.4/io_uring-2019-09-27' of git://git.kernel.dk/linux-block · 738f531d
      Linus Torvalds authored
      Pull more io_uring updates from Jens Axboe:
       "Just two things in here:
         - Improvement to the io_uring CQ ring wakeup for batched IO (me)
         - Fix wrong comparison in poll handling (yangerkun)
        I realize the first one is a little late in the game, but it felt
        pointless to hold it off until the next release. Went through various
        testing and reviews with Pavel and peterz"
      * tag 'for-5.4/io_uring-2019-09-27' of git://git.kernel.dk/linux-block:
        io_uring: make CQ ring wakeups be more efficient
        io_uring: compare cached_cq_tail with cq.head in_io_uring_poll
    • Linus Torvalds's avatar
      Merge tag 'for-linus-2019-09-27' of git://git.kernel.dk/linux-block · 47db9b9a
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
       "A few fixes/changes to round off this merge window. This contains:
         - Small series making some functional tweaks to blk-iocost (Tejun)
         - Elevator switch locking fix (Ming)
         - Kill redundant call in blk-wbt (Yufen)
         - Fix flush timeout handling (Yufen)"
      * tag 'for-linus-2019-09-27' of git://git.kernel.dk/linux-block:
        block: fix null pointer dereference in blk_mq_rq_timed_out()
        rq-qos: get rid of redundant wbt_update_limits()
        iocost: bump up default latency targets for hard disks
        iocost: improve nr_lagging handling
        iocost: better trace vrate changes
        block: don't release queue's sysfs lock during switching elevator
        blk-mq: move lockdep_assert_held() into elevator_exit
    • Linus Torvalds's avatar
      Merge branch 'for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux · d0e00bc5
      Linus Torvalds authored
      Pull thermal management updates from Zhang Rui:
       - Add Amit Kucheria as thermal subsystem Reviewer (Amit Kucheria)
       - Fix a use after free bug when unregistering thermal zone devices (Ido
       - Fix thermal core framework to use put_device() when device_register()
         fails (Yue Hu)
       - Enable intel_pch_thermal and MMIO RAPL support for Intel Icelake
         platform (Srinivas Pandruvada)
       - Add clock operations in qorip thermal driver, for some platforms with
         clock control like i.MX8MQ (Anson Huang)
       - A couple of trivial fixes and cleanups for thermal core and different
         soc thermal drivers (Amit Kucheria, Christophe JAILLET, Chuhong Yuan,
         Fuqian Huang, Kelsey Skunberg, Nathan Huckleberry, Rishi Gupta,
         Srinivas Kandagatla)
      * 'for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
        MAINTAINERS: Add Amit Kucheria as reviewer for thermal
        thermal: Add some error messages
        thermal: Fix use-after-free when unregistering thermal zone device
        thermal/drivers/core: Use put_device() if device_register() fails
        thermal_hwmon: Sanitize thermal_zone type
        thermal: intel: Use dev_get_drvdata
        thermal: intel: int3403: replace printk(KERN_WARN...) with pr_warn(...)
        thermal: intel: int340x_thermal: Remove unnecessary acpi_has_method() uses
        thermal: int340x: processor_thermal: Add Ice Lake support
        drivers: thermal: qcom: tsens: Fix memory leak from qfprom read
        thermal: tegra: Fix a typo
        thermal: rcar_gen3_thermal: Replace devm_add_action() followed by failure action with devm_add_action_or_reset()
        thermal: armada: Fix -Wshift-negative-value
        dt-bindings: thermal: qoriq: Add optional clocks property
        thermal: qoriq: Use __maybe_unused instead of #if CONFIG_PM_SLEEP
        thermal: qoriq: Use devm_platform_ioremap_resource() instead of of_iomap()
        thermal: qoriq: Fix error path of calling qoriq_tmu_register_tmu_zone fail
        thermal: qoriq: Add clock operations
        drivers: thermal: processor_thermal_device: Export sysfs interface for TCC offset
    • Linus Torvalds's avatar
      Merge tag 'linux-watchdog-5.4-rc1' of git://www.linux-watchdog.org/linux-watchdog · 7bccb9f1
      Linus Torvalds authored
      Pull watchdog updates from Wim Van Sebroeck:
       - addition of AST2600, i.MX7ULP and F81803 watchdog support
       - removal of the w90x900 and ks8695 drivers
       - ziirave_wdt improvements
       - small fixes and improvements
      * tag 'linux-watchdog-5.4-rc1' of git://www.linux-watchdog.org/linux-watchdog: (51 commits)
        watchdog: f71808e_wdt: Add F81803 support
        watchdog: qcom: remove unnecessary variable from private storage
        watchdog: qcom: support pre-timeout when the bark irq is available
        watchdog: imx_sc: this patch just fixes whitespaces
        watchdog: apseed: Add access_cs0 option for alt-boot
        watchdog: aspeed: add support for dual boot
        watchdog: orion_wdt: use timer1 as a pretimeout
        watchdog: Add i.MX7ULP watchdog support
        dt-bindings: watchdog: Add i.MX7ULP bindings
        dt-bindings: watchdog: sun4i: Add the watchdog clock
        dt-bindings: watchdog: sun4i: Add the watchdog interrupts
        dt-bindings: watchdog: Convert Allwinner watchdog to a schema
        dt-bindings: watchdog: Add YAML schemas for the generic watchdog bindings
        watchdog: aspeed: Add support for AST2600
        dt-bindings: watchdog: Add ast2600 compatible
        watchdog: ziirave_wdt: Update checked I2C functionality mask
        watchdog: ziirave_wdt: Drop ziirave_firm_write_block_data()
        watchdog: ziirave_wdt: Fix DOWNLOAD_START payload
        watchdog: ziirave_wdt: Drop status polling code
        watchdog: ziirave_wdt: Fix RESET_PROCESSOR payload
    • Linus Torvalds's avatar
      Merge tag 'drm-next-2019-09-27' of git://anongit.freedesktop.org/drm/drm · 289991ce
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Fixes built up over the past 1.5 weeks or so, it's two weeks of
        amdgpu, some core cleanups and some panfrost fixes. I also finally
        figured out why my desktop was slow to do a bunch of stuff (someone
        gave it an IPv6 address which can't reach anything!).
         - Some cleanups and fixes in the self-refresh helpers
         - Some cleanups and fixes in the atomic helpers
         - Fix a 64 bit divide
         - Prevent a memory leak in a failure case in dc
         - Load proper gfx firmware on navi14 variants
         - Add more navi12 and navi14 PCI ids
         - Misc fixes for renoir
         - Fix bandwidth issues with multiple displays on vega20
         - Support for Dali
         - Fix a possible oops with KFD on hawaii
         - Fix for backlight level after resume on some APUs
         - Other misc fixes
         - Multiple panfrost fixes for regulator support and page fault
      * tag 'drm-next-2019-09-27' of git://anongit.freedesktop.org/drm/drm: (34 commits)
        drm/amd/display: prevent memory leak
        drm/amdgpu/gfx10: add support for wks firmware loading
        drm/amdgpu/display: include slab.h in dcn21_resource.c
        drm/amdgpu/display: fix 64 bit divide
        drm/panfrost: Prevent race when handling page fault
        drm/panfrost: Remove NULL checks for regulator
        drm/panfrost: Fix regulator_get_optional() misuse
        drm: Measure Self Refresh Entry/Exit times to avoid thrashing
        drm: Fix kerneldoc and remove unused struct member in self_refresh helper
        drm/atomic: Rename crtc_state->pageflip_flags to async_flip
        drm/atomic: Reject FLIP_ASYNC unconditionally
        drm/atomic: Take the atomic toys away from X
        drm/amdgpu: flag navi12 and 14 as experimental for 5.4
        drm/kms: Duct-tape for mode object lifetime checks
        drm/amdgpu: add navi12 pci id
        drm/amdgpu: add navi14 PCI ID for work station SKU
        drm/amdkfd: Swap trap temporary registers in gfx10 trap handler
        drm/amd/powerplay: implement sysfs for getting dpm clock
        drm/amd/display: Restore backlight brightness after system resume
        drm/amd/display: Implement voltage limitation for dali
    • Linus Torvalds's avatar
      Merge tag 'ntb-5.4' of git://github.com/jonmason/ntb · 0cd81d77
      Linus Torvalds authored
      Pull NTB updates from Jon Mason:
       "A few bugfixes and support for new AMD NTB hardware"
      * tag 'ntb-5.4' of git://github.com/jonmason/ntb:
        NTB: fix IDT Kconfig typos/spellos
        ntb_hw_amd: Add memory window support for new AMD hardware
        ntb_hw_amd: Add a new NTB PCI device ID
        NTB: ntb_transport: remove redundant assignment to rc
        ntb_hw_switchtec: make ntb_mw_set_trans() work when addr == 0
        ntb: point to right memory window index
    • Jarkko Sakkinen's avatar
      keys: Add Jarkko Sakkinen as co-maintainer · ea1e2bbe
      Jarkko Sakkinen authored
      To address a major procedural concern on Linus's part the keyrings needs
      a co-maintainer.
      Suggested-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Yufen Yu's avatar
      block: fix null pointer dereference in blk_mq_rq_timed_out() · 8d699663
      Yufen Yu authored
      We got a null pointer deference BUG_ON in blk_mq_rq_timed_out()
      as following:
      [  108.825472] BUG: kernel NULL pointer dereference, address: 0000000000000040
      [  108.827059] PGD 0 P4D 0
      [  108.827313] Oops: 0000 [#1] SMP PTI
      [  108.827657] CPU: 6 PID: 198 Comm: kworker/6:1H Not tainted 5.3.0-rc8+ #431
      [  108.829503] Workqueue: kblockd blk_mq_timeout_work
      [  108.829913] RIP: 0010:blk_mq_check_expired+0x258/0x330
      [  108.838191] Call Trace:
      [  108.838406]  bt_iter+0x74/0x80
      [  108.838665]  blk_mq_queue_tag_busy_iter+0x204/0x450
      [  108.839074]  ? __switch_to_asm+0x34/0x70
      [  108.839405]  ? blk_mq_stop_hw_queue+0x40/0x40
      [  108.839823]  ? blk_mq_stop_hw_queue+0x40/0x40
      [  108.840273]  ? syscall_return_via_sysret+0xf/0x7f
      [  108.840732]  blk_mq_timeout_work+0x74/0x200
      [  108.841151]  process_one_work+0x297/0x680
      [  108.841550]  worker_thread+0x29c/0x6f0
      [  108.841926]  ? rescuer_thread+0x580/0x580
      [  108.842344]  kthread+0x16a/0x1a0
      [  108.842666]  ? kthread_flush_work+0x170/0x170
      [  108.843100]  ret_from_fork+0x35/0x40
      The bug is caused by the race between timeout handle and completion for
      flush request.
      When timeout handle function blk_mq_rq_timed_out() try to read
      'req->q->mq_ops', the 'req' have completed and reinitiated by next
      flush request, which would call blk_rq_init() to clear 'req' as 0.
      After commit 12f5b931
       ("blk-mq: Remove generation seqeunce"),
      normal requests lifetime are protected by refcount. Until 'rq->ref'
      drop to zero, the request can really be free. Thus, these requests
      cannot been reused before timeout handle finish.
      However, flush request has defined .end_io and rq->end_io() is still
      called even if 'rq->ref' doesn't drop to zero. After that, the 'flush_rq'
      can be reused by the next flush request handle, resulting in null
      pointer deference BUG ON.
      We fix this problem by covering flush request with 'rq->ref'.
      If the refcount is not zero, flush_end_io() return and wait the
      last holder recall it. To record the request status, we add a new
      entry 'rq_status', which will be used in flush_end_io().
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: Keith Busch <keith.busch@intel.com>
      Cc: Bart Van Assche <bvanassche@acm.org>
      Cc: stable@vger.kernel.org # v4.18+
      Reviewed-by: default avatarMing Lei <ming.lei@redhat.com>
      Reviewed-by: default avatarBob Liu <bob.liu@oracle.com>
      Signed-off-by: default avatarYufen Yu <yuyufen@huawei.com>
       - move rq_status from struct request to struct blk_flush_queue
       - remove unnecessary '{}' pair.
       - let spinlock to protect 'fq->rq_status'
       - move rq_status after flush_running_idx member of struct blk_flush_queue
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
    • Yufen Yu's avatar
      rq-qos: get rid of redundant wbt_update_limits() · 2af2783f
      Yufen Yu authored
      We have updated limits after calling wbt_set_min_lat(). No need to
      update again.
      Reviewed-by: default avatarBob Liu <bob.liu@oracle.com>
      Signed-off-by: default avatarYufen Yu <yuyufen@huawei.com>
      Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
  3. 26 Sep, 2019 14 commits
    • Oliver O'Halloran's avatar
      powerpc/eeh: Fix eeh eeh_debugfs_break_device() with SRIOV devices · 253c8921
      Oliver O'Halloran authored
      Fixes: bd6461cc
       ("powerpc/eeh: Add a eeh_dev_break debugfs interface")
      Signed-off-by: default avatarOliver O'Halloran <oohall@gmail.com>
      [mpe: Fixup the #endif comment as well]
      Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
      Link: https://lore.kernel.org/r/20190926122502.14826-1-oohall@gmail.com
    • Linus Torvalds's avatar
      Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · da05b5ea
      Linus Torvalds authored
      Pull timer fix from Ingo Molnar:
       "Fix a timer expiry bug that would cause spurious delay of timers"
      * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
        timer: Read jiffies once when forwarding base clk
    • Linus Torvalds's avatar
      Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · a7b7b772
      Linus Torvalds authored
      Pull more perf updates from Ingo Molnar:
       "The only kernel change is comment typo fixes.
        The rest is mostly tooling fixes, but also new vendor event additions
        and updates, a bigger libperf/libtraceevent library and a header files
        reorganization that came in a bit late"
      * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (108 commits)
        perf unwind: Fix libunwind build failure on i386 systems
        perf parser: Remove needless include directives
        perf build: Add detection of java-11-openjdk-devel package
        perf jvmti: Include JVMTI support for s390
        perf vendor events: Remove P8 HW events which are not supported
        perf evlist: Fix access of freed id arrays
        perf stat: Fix free memory access / memory leaks in metrics
        perf tools: Replace needless mmap.h with what is needed, event.h
        perf evsel: Move config terms to a separate header
        perf evlist: Remove unused perf_evlist__fprintf() method
        perf evsel: Introduce evsel_fprintf.h
        perf evsel: Remove need for symbol_conf in evsel_fprintf.c
        perf copyfile: Move copyfile routines to separate files
        libperf: Add perf_evlist__poll() function
        libperf: Add perf_evlist__add_pollfd() function
        libperf: Add perf_evlist__alloc_pollfd() function
        libperf: Add libperf_init() call to the tests
        libperf: Merge libperf_set_print() into libperf_init()
        libperf: Add libperf dependency for tests targets
        libperf: Use sys/types.h to get ssize_t, not unistd.h
    • Linus Torvalds's avatar
      Merge tag 'trace-v5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 7897c04a
      Linus Torvalds authored
      Pull tracing fix from Steven Rostedt:
       "Srikar Dronamraju fixed a bug in the newmulti probe code"
      * tag 'trace-v5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        tracing/probe: Fix same probe event argument matching
    • Arnaldo Carvalho de Melo's avatar
      perf unwind: Fix libunwind build failure on i386 systems · 26acf400
      Arnaldo Carvalho de Melo authored
      Naresh Kamboju reported, that on the i386 build pr_err()
      doesn't get defined properly due to header ordering:
        perf-in.o: In function `libunwind__x86_reg_id':
        undefined reference to `pr_err'
      Reported-by: default avatarNaresh Kamboju <naresh.kamboju@linaro.org>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: linux-kernel@vger.kernel.org
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
    • Linus Torvalds's avatar
      Merge tag 'usercopy-v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux · 0576f060
      Linus Torvalds authored
      Pull usercopy fix from Kees Cook:
       "Fix hardened usercopy under CONFIG_DEBUG_VIRTUAL"
      * tag 'usercopy-v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
        usercopy: Avoid HIGHMEM pfn warning
    • Linus Torvalds's avatar
      Merge tag 'linux-kselftest-5.4-rc1.1' of... · 797a3242
      Linus Torvalds authored
      Merge tag 'linux-kselftest-5.4-rc1.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      Pull Kselftest updates from Shuah Khan:
       "Fixes to existing tests"
      * tag 'linux-kselftest-5.4-rc1.1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
        selftests: tpm2: install python files
        selftests: livepatch: add missing fragments to config
        selftests: watchdog: cleanup whitespace in usage options
        selftest/ftrace: Fix typo in trigger-snapshot.tc
        selftests: watchdog: Add optional file argument
        selftests/seccomp: fix build on older kernels
        selftests: use "$(MAKE)" instead of "make"
    • Linus Torvalds's avatar
      Merge tag 'nfs-for-5.4-1' of git://git.linux-nfs.org/projects/anna/linux-nfs · 972a2bf7
      Linus Torvalds authored
      Pull NFS client updates from Anna Schumaker:
       "Stable bugfixes:
         - Dequeue the request from the receive queue while we're re-encoding
           # v4.20+
         - Fix buffer handling of GSS MIC without slack # 5.1
         - Increase xprtrdma maximum transport header and slot table sizes
         - Add support for nfs4_call_sync() calls using a custom
         - Optimize the default readahead size
         - Enable pNFS filelayout LAYOUTGET on OPEN
        Other bugfixes and cleanups:
         - Fix possible null-pointer dereferences and memory leaks
         - Various NFS over RDMA cleanups
         - Various NFS over RDMA comment updates
         - Don't receive TCP data into a reset request buffer
         - Don't try to parse incomplete RPC messages
         - Fix congestion window race with disconnect
         - Clean up pNFS return-on-close error handling
         - Fixes for NFS4ERR_OLD_STATEID handling"
      * tag 'nfs-for-5.4-1' of git://git.linux-nfs.org/projects/anna/linux-nfs: (53 commits)
        pNFS/filelayout: enable LAYOUTGET on OPEN
        NFS: Optimise the default readahead size
        NFSv4: Handle NFS4ERR_OLD_STATEID in LOCKU
        NFSv4: Fix OPEN_DOWNGRADE error handling
        pNFS: Handle NFS4ERR_OLD_STATEID on layoutreturn by bumping the state seqid
        NFSv4: Add a helper to increment stateid seqids
        NFSv4: Handle RPC level errors in LAYOUTRETURN
        NFSv4: Handle NFS4ERR_DELAY correctly in return-on-close
        NFSv4: Clean up pNFS return-on-close error handling
        pNFS: Ensure we do clear the return-on-close layout stateid on fatal errors
        NFS: remove unused check for negative dentry
        NFSv3: use nfs_add_or_obtain() to create and reference inodes
        NFS: Refactor nfs_instantiate() for dentry referencing callers
        SUNRPC: Fix congestion window race with disconnect
        SUNRPC: Don't try to parse incomplete RPC messages
        SUNRPC: Rename xdr_buf_read_netobj to xdr_buf_read_mic
        SUNRPC: Fix buffer handling of GSS MIC without slack
        SUNRPC: RPC level errors should always set task->tk_rpc_status
        SUNRPC: Don't receive TCP data into a request buffer that has been reset
    • Kees Cook's avatar
      binfmt_elf: Do not move brk for INTERP-less ET_EXEC · 7be3cb01
      Kees Cook authored
      When brk was moved for binaries without an interpreter, it should have
      been limited to ET_DYN only. In other words, the special case was an
      ET_DYN that lacks an INTERP, not just an executable that lacks INTERP.
      The bug manifested for giant static executables, where the brk would end
      up in the middle of the text area on 32-bit architectures.
      Reported-and-tested-by: default avatarRichard Kojedzinszky <richard@kojedz.in>
      Fixes: bbdc6076
       ("binfmt_elf: move brk out of mmap when doing direct loader exec")
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarKees Cook <keescook@chromium.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    • Linus Torvalds's avatar
      Merge tag 'xfs-5.4-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux · 2268419e
      Linus Torvalds authored
      Pull xfs fixes from Darrick Wong:
       "There are a couple of bug fixes and some small code cleanups that came
        in recently:
         - Minor code cleanups
         - Fix a superblock logging error
         - Ensure that collapse range converts the data fork to extents format
           when necessary
         - Revert the ALLOC_USERDATA cleanup because it caused subtle behavior
      * tag 'xfs-5.4-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
        xfs: avoid unused to_mp() function warning
        xfs: log proper length of superblock
        xfs: revert 1baa2800 ("xfs: remove the unused XFS_ALLOC_USERDATA flag")
        xfs: removed unneeded variable
        xfs: convert inode to extent format after extent merge due to shift
    • Linus Torvalds's avatar
      Merge branch 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · dadedd85
      Linus Torvalds authored
      Pull jffs2 fix from Al Viro:
       "braino fix for mount API conversion for jffs2"
      * 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        jffs2: Fix mounting under new mount API
    • Linus Torvalds's avatar
      Merge tag 's390-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux · 16cdf084
      Linus Torvalds authored
      Pull more s390 updates from Vasily Gorbik:
       - Fix three kasan findings
       - Add PERF_EVENT_IOC_PERIOD ioctl support
       - Add Crypto Express7S support and extend sysfs attributes for pkey
       - Minor common I/O layer documentation corrections
      * tag 's390-5.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
        s390/cio: exclude subchannels with no parent from pseudo check
        s390/cio: avoid calling strlen on null pointer
        s390/topology: avoid firing events before kobjs are created
        s390/cpumf: Remove mixed white space
        s390/cpum_sf: Support ioctl PERF_EVENT_IOC_PERIOD
        s390/zcrypt: CEX7S exploitation support
        s390/cio: fix intparm documentation
        s390/pkey: Add sysfs attributes to emit AES CIPHER key blobs
    • Linus Torvalds's avatar
      Merge tag 'for-linus-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip · ec56103e
      Linus Torvalds authored
      Pull xen update from Juergen Gross:
       "Only two small patches this time:
         - a small cleanup for swiotlb-xen
         - a fix for PCI initialization for some platforms"
      * tag 'for-linus-5.4-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
        xen/pci: reserve MCFG areas earlier
        swiotlb-xen: Convert to use macro
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · cbafe18c
      Linus Torvalds authored
      Merge more updates from Andrew Morton:
       - almost all of the rest of -mm
       - various other subsystems
      Subsystems affected by this patch series:
        memcg, misc, core-kernel, lib, checkpatch, reiserfs, fat, fork,
        cpumask, kexec, uaccess, kconfig, kgdb, bug, ipc, lzo, kasan, madvise,
        cleanups, pagemap
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (77 commits)
        arch/sparc/include/asm/pgtable_64.h: fix build
        mm: treewide: clarify pgtable_page_{ctor,dtor}() naming
        ntfs: remove (un)?likely() from IS_ERR() conditions
        IB/hfi1: remove unlikely() from IS_ERR*() condition
        xfs: remove unlikely() from WARN_ON() condition
        wimax/i2400m: remove unlikely() from WARN*() condition
        fs: remove unlikely() from WARN_ON() condition
        xen/events: remove unlikely() from WARN() condition
        checkpatch: check for nested (un)?likely() calls
        hexagon: drop empty and unused free_initrd_mem
        mm: factor out common parts between MADV_COLD and MADV_PAGEOUT
        mm: introduce MADV_PAGEOUT
        mm: introduce MADV_COLD
        mm: untag user pointers in mmap/munmap/mremap/brk
        vfio/type1: untag user pointers in vaddr_get_pfn
        tee/shm: untag user pointers in tee_shm_register
        media/v4l2-core: untag user pointers in videobuf_dma_contig_user_get
        drm/radeon: untag user pointers in radeon_gem_userptr_ioctl
        drm/amdgpu: untag user pointers