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authorPaul E. McKenney <paulmck@linux.ibm.com>2018-12-10 20:44:52 +0300
committerPaul E. McKenney <paulmck@linux.ibm.com>2019-01-26 02:37:10 +0300
commit3a6cb58f159e64241b2af9374acad41a70939349 (patch)
treeada940f453392a61ee945b23974647841ee65700 /include/linux/torture.h
parent0d8a9ea9764a0e34e17e3b80a2be3855de239d6e (diff)
downloadlinux-3a6cb58f159e64241b2af9374acad41a70939349.tar.xz
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.h3
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);