• Akinobu Mita's avatar
    memory: memory notifier error injection module · 9579f5bd
    Akinobu Mita authored
    This provides the ability to inject artifical errors to memory hotplug
    notifier chain callbacks.  It is controlled through debugfs interface
    under /sys/kernel/debug/notifier-error-inject/memory
    
    If the notifier call chain should be failed with some events notified,
    write the error code to "actions/<notifier event>/error".
    
    Example: Inject memory hotplug offline error (-12 == -ENOMEM)
    
    	# cd /sys/kernel/debug/notifier-error-inject/memory
    	# echo -12 > actions/MEM_GOING_OFFLINE/error
    	# echo offline > /sys/devices/system/memory/memoryXXX/state
    	bash: echo: write error: Cannot allocate memory
    Signed-off-by: 's avatarAkinobu Mita <akinobu.mita@gmail.com>
    Cc: Pavel Machek <pavel@ucw.cz>
    Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
    Cc: Greg KH <greg@kroah.com>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Michael Ellerman <michael@ellerman.id.au>
    Cc: Dave Jones <davej@redhat.com>
    Signed-off-by: 's avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
    9579f5bd