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| author | Paul E. McKenney | 2011-05-16 11:52:04 +0200 |
|---|---|---|
| committer | Paul E. McKenney | 2011-05-26 18:42:21 +0200 |
| commit | b5904090c754327ed6c2ecaefed4f7d473df393f (patch) | |
| tree | 46cf53f98413171d92de3b5e11c9327309f240b7 /kernel/rcutree.c | |
| parent | rcu: Remove old memory barriers from rcu_process_callbacks() (diff) | |
| download | kernel-qcow2-linux-b5904090c754327ed6c2ecaefed4f7d473df393f.tar.gz kernel-qcow2-linux-b5904090c754327ed6c2ecaefed4f7d473df393f.tar.xz kernel-qcow2-linux-b5904090c754327ed6c2ecaefed4f7d473df393f.zip | |
rcu: Don't do reschedule unless in irq
Condition the set_need_resched() in rcu_irq_exit() on in_irq(). This
should be a no-op, because rcu_irq_exit() should only be called from irq.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutree.c')
| -rw-r--r-- | kernel/rcutree.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index 011bf6f261a2..195b3a3313e3 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -421,8 +421,9 @@ void rcu_irq_exit(void) WARN_ON_ONCE(rdtp->dynticks & 0x1); /* If the interrupt queued a callback, get out of dyntick mode. */ - if (__this_cpu_read(rcu_sched_data.nxtlist) || - __this_cpu_read(rcu_bh_data.nxtlist)) + if (in_irq() && + (__this_cpu_read(rcu_sched_data.nxtlist) || + __this_cpu_read(rcu_bh_data.nxtlist))) set_need_resched(); } |