• Vladimir Davydov's avatar
    memcg: use generic slab iterators for showing slabinfo · b047501c
    Vladimir Davydov authored
    
    
    Let's use generic slab_start/next/stop for showing memcg caches info.  In
    contrast to the current implementation, this will work even if all memcg
    caches' info doesn't fit into a seq buffer (a page), plus it simply looks
    neater.
    
    Actually, the main reason I do this isn't mere cleanup.  I'm going to zap
    the memcg_slab_caches list, because I find it useless provided we have the
    slab_caches list, and this patch is a step in this direction.
    
    It should be noted that before this patch an attempt to read
    memory.kmem.slabinfo of a cgroup that doesn't have kmem limit set resulted
    in -EIO, while after this patch it will silently show nothing except the
    header, but I don't think it will frustrate anyone.
    Signed-off-by: default avatarVladimir Davydov <vdavydov@parallels.com>
    Cc: Christoph Lameter <cl@linux.com>
    Cc: Pekka Enberg <penberg@kernel.org>
    Cc: David Rientjes <rientjes@google.com>
    Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
    Cc: Johannes Weiner <hannes@cmpxchg.org>
    Cc: Michal Hocko <mhocko@suse.cz>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    b047501c