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| author | Ingo Molnar <mingo@kernel.org> | 2012-10-24 10:20:57 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-10-24 10:20:57 +0200 |
| commit | ef8c029fa793423439e67ef0416b220d3fa3321a (patch) | |
| tree | 4199cefa6e1dcad1783040755246a14371f029af /kernel/rcupdate.c | |
| parent | 6fcdb1ed2ef3548d5a9428d6ae60158ddd46a608 (diff) | |
| parent | c13d38e4a1fd5dd07135403c613c8091af444169 (diff) | |
Merge branch 'perf/urgent' into perf/core
Pick up v3.7-rc2 and fixes before applying more patches.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/rcupdate.c')
| -rw-r--r-- | kernel/rcupdate.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c index 4e6a61b15e8..29ca1c6da59 100644 --- a/kernel/rcupdate.c +++ b/kernel/rcupdate.c @@ -45,6 +45,7 @@ #include <linux/mutex.h> #include <linux/export.h> #include <linux/hardirq.h> +#include <linux/delay.h> #define CREATE_TRACE_POINTS #include <trace/events/rcu.h> @@ -81,6 +82,9 @@ void __rcu_read_unlock(void) } else { barrier(); /* critical section before exit code. */ t->rcu_read_lock_nesting = INT_MIN; +#ifdef CONFIG_PROVE_RCU_DELAY + udelay(10); /* Make preemption more probable. */ +#endif /* #ifdef CONFIG_PROVE_RCU_DELAY */ barrier(); /* assign before ->rcu_read_unlock_special load */ if (unlikely(ACCESS_ONCE(t->rcu_read_unlock_special))) rcu_read_unlock_special(t); |