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| author | Borislav Petkov <[email protected]> | 2014-06-20 21:16:45 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2014-06-24 13:17:01 +0000 |
| commit | 27c934158c5be0bebfb2970da521b9d9efc0058b (patch) | |
| tree | e943e5c07306850caca97f81c8c387b826c7e2f8 /tools/perf/scripts/python/check-perf-trace.py | |
| parent | x86, MCE: Kill CPU_POST_DEAD (diff) | |
| download | kernel-27c934158c5be0bebfb2970da521b9d9efc0058b.tar.gz kernel-27c934158c5be0bebfb2970da521b9d9efc0058b.zip | |
x86, MCE: Robustify mcheck_init_device
BorisO reports that misc_register() fails often on xen. The current code
unregisters the CPU hotplug notifier in that case. If then a CPU is
offlined and onlined back again, we end up with a second timer running
on that CPU, leading to soft lockups and system hangs.
So let's leave the hotcpu notifier always registered - even if
mce_device_create failed for some cores and never unreg it so that we
can deal with the timer handling accordingly.
Reported-and-Tested-by: Boris Ostrovsky <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Borislav Petkov <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions