• Akinobu Mita's avatar
    [PATCH] fault-injection capability for kmalloc · 8a8b6502
    Akinobu Mita authored
    
    
    This patch provides fault-injection capability for kmalloc.
    
    Boot option:
    
    failslab=<interval>,<probability>,<space>,<times>
    
    	<interval> -- specifies the interval of failures.
    
    	<probability> -- specifies how often it should fail in percent.
    
    	<space> -- specifies the size of free space where memory can be
    		   allocated safely in bytes.
    
    	<times> -- specifies how many times failures may happen at most.
    
    Debugfs:
    
    /debug/failslab/interval
    /debug/failslab/probability
    /debug/failslab/specifies
    /debug/failslab/times
    /debug/failslab/ignore-gfp-highmem
    /debug/failslab/ignore-gfp-wait
    
    Example:
    
    	failslab=10,100,0,-1
    
    slab allocation (kmalloc(), kmem_cache_alloc(),..) fails once per 10 times.
    
    Cc: Pekka Enberg <penberg@cs.helsinki.fi>
    Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    8a8b6502