diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2017-09-12 21:36:56 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-14 11:41:03 +0200 |
| commit | 2406e3b166eee42777a6b0b38f52f924454474d7 (patch) | |
| tree | 955877e11ae1214cf8ed504c616457e70d671299 /arch/x86/video | |
| parent | watchdog/hardlockup: Provide interface to stop/restart perf events (diff) | |
| download | linux-2406e3b166eee42777a6b0b38f52f924454474d7.tar.xz linux-2406e3b166eee42777a6b0b38f52f924454474d7.zip | |
perf/x86/intel, watchdog/core: Sanitize PMU HT bug workaround
The lockup_detector_suspend/resume() interface is broken in several ways
especially as it results in recursive locking of the CPU hotplug lock.
Use the new stop/restart interface in the perf NMI watchdog to temporarily
disable and reenable the already active watchdog events. That's enough to
handle it.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Don Zickus <dzickus@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Link: http://lkml.kernel.org/r/20170912194146.247141871@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/video')
0 files changed, 0 insertions, 0 deletions