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authorUlrich Obergfell <uobergfe@redhat.com>2015-04-14 15:44:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-14 16:48:59 -0700
commitbcfba4f4bf3c9c7c72b459d52a9e826dfd72855e (patch)
tree8e439f7790d9e572a55c2c257fafabbaca865563 /arch/arm/mm
parent83a80a39075a9ded23df1e26a4b617c289077630 (diff)
watchdog: implement error handling for failure to set up hardware perf events
If watchdog_nmi_enable() fails to set up the hardware perf event of one CPU, the entire hard lockup detector is deemed unreliable. Hence, disable the hard lockup detector and shut down the hardware perf events on all CPUs. [dzickus@redhat.com: update comments to explain some code] Signed-off-by: Ulrich Obergfell <uobergfe@redhat.com> Signed-off-by: Don Zickus <dzickus@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/mm')
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