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| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-12-10 09:44:52 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2019-01-25 15:37:10 -0800 |
| commit | 3a6cb58f159e64241b2af9374acad41a70939349 (patch) | |
| tree | ada940f453392a61ee945b23974647841ee65700 /kernel/locking/locktorture.c | |
| parent | 0d8a9ea9764a0e34e17e3b80a2be3855de239d6e (diff) | |
| download | lwn-3a6cb58f159e64241b2af9374acad41a70939349.tar.gz lwn-3a6cb58f159e64241b2af9374acad41a70939349.zip | |
rcutorture: Add grace period after CPU offline
Beyond a certain point in the CPU-hotplug offline process, timers get
stranded on the outgoing CPU, and won't fire until that CPU comes back
online, which might well be never. This commit therefore adds a hook
in torture_onoff_init() that is invoked from torture_offline(), which
rcutorture uses to occasionally wait for a grace period. This should
result in failures for RCU implementations that rely on stranded timers
eventually firing in the absence of the CPU coming back online.
Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Diffstat (limited to 'kernel/locking/locktorture.c')
| -rw-r--r-- | kernel/locking/locktorture.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c index 7d0b0ed74404..c8b348097bb5 100644 --- a/kernel/locking/locktorture.c +++ b/kernel/locking/locktorture.c @@ -970,7 +970,7 @@ static int __init lock_torture_init(void) /* Prepare torture context. */ if (onoff_interval > 0) { firsterr = torture_onoff_init(onoff_holdoff * HZ, - onoff_interval * HZ); + onoff_interval * HZ, NULL); if (firsterr) goto unwind; } |