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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 /include/linux/torture.h | |
| 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 'include/linux/torture.h')
| -rw-r--r-- | include/linux/torture.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/torture.h b/include/linux/torture.h index 48fad21109fc..f2d3bcbf4337 100644 --- a/include/linux/torture.h +++ b/include/linux/torture.h @@ -50,11 +50,12 @@ do { if (verbose) pr_alert("%s" TORTURE_FLAG "!!! %s\n", torture_type, s); } while (0) /* Definitions for online/offline exerciser. */ +typedef void torture_ofl_func(void); bool torture_offline(int cpu, long *n_onl_attempts, long *n_onl_successes, unsigned long *sum_offl, int *min_onl, int *max_onl); bool torture_online(int cpu, long *n_onl_attempts, long *n_onl_successes, unsigned long *sum_onl, int *min_onl, int *max_onl); -int torture_onoff_init(long ooholdoff, long oointerval); +int torture_onoff_init(long ooholdoff, long oointerval, torture_ofl_func *f); void torture_onoff_stats(void); bool torture_onoff_failures(void); |