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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-08-20 08:54:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-08-20 08:54:30 -0700 |
| commit | e18a5ebc2d507f42ca724581a1039ba058fa12da (patch) | |
| tree | 9c2378623f5b97f82e1ed31ffb66f21924f35e32 /kernel/watchdog.c | |
| parent | 58d4e450a490d5f02183f6834c12550ba26d3b47 (diff) | |
| parent | 7edaeb6841dfb27e362288ab8466ebdc4972e867 (diff) | |
| download | linux-e18a5ebc2d507f42ca724581a1039ba058fa12da.tar.gz linux-e18a5ebc2d507f42ca724581a1039ba058fa12da.tar.bz2 linux-e18a5ebc2d507f42ca724581a1039ba058fa12da.zip | |
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull watchdog fix from Thomas Gleixner:
"A fix for the hardlockup watchdog to prevent false positives with
extreme Turbo-Modes which make the perf/NMI watchdog fire faster than
the hrtimer which is used to verify.
Slightly larger than the minimal fix, which just would increase the
hrtimer frequency, but comes with extra overhead of more watchdog
timer interrupts and thread wakeups for all users.
With this change we restrict the overhead to the extreme Turbo-Mode
systems"
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
kernel/watchdog: Prevent false positives with turbo modes
Diffstat (limited to 'kernel/watchdog.c')
| -rw-r--r-- | kernel/watchdog.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 06d3389bca0d..f5d52024f6b7 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -240,6 +240,7 @@ static void set_sample_period(void) * hardlockup detector generates a warning */ sample_period = get_softlockup_thresh() * ((u64)NSEC_PER_SEC / 5); + watchdog_update_hrtimer_threshold(sample_period); } /* Commands for resetting the watchdog */ |