• Akinobu Mita's avatar
    [PATCH] fault injection: documentation and scripts · de1ba09b
    Akinobu Mita authored
    This patch set provides some fault-injection capabilities.
    
    - kmalloc() failures
    
    - alloc_pages() failures
    
    - disk IO errors
    
    We can see what really happens if those failures happen.
    
    In order to enable these fault-injection capabilities:
    
    1. Enable relevant config options (CONFIG_FAILSLAB, CONFIG_PAGE_ALLOC,
       CONFIG_MAKE_REQUEST) and if you want to configure them via debugfs,
       enable CONFIG_FAULT_INJECTION_DEBUG_FS.
    
    2. Build and boot with this kernel
    
    3. Configure fault-injection capabilities behavior by boot option or debugfs
    
       - Boot option
    
         failslab=
         fail_page_alloc=
         fail_make_request=
    
       - Debugfs
    
         /debug/failslab/*
         /debug/fail_page_alloc/*
         /debug/fail_make_request/*
    
       Please refer to the Documentation/fault-injection/fault-injection.txt
       for details.
    
    4. See what really happens.
    Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
    Signed-off-by: default avatarDon Mullis <dwm@meer.net>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    de1ba09b
fault-injection.txt 5.61 KB