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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-08-08 21:47:09 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-11 13:46:53 +0200
commitb845b517b5e3706a3729f6ea83b88ab85f0725b0 (patch)
tree4311e4c2e6c3fdbdbe89149d1501944294186455 /kernel/time
parent796aadeb1b2db9b5d463946766c5bbfd7717158c (diff)
printk: robustify printk
Avoid deadlocks against rq->lock and xtime_lock by deferring the klogd wakeup by polling from the timer tick. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/tick-sched.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 825b4c00fe4..c13d4f18237 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -255,7 +255,7 @@ void tick_nohz_stop_sched_tick(int inidle)
next_jiffies = get_next_timer_interrupt(last_jiffies);
delta_jiffies = next_jiffies - last_jiffies;
- if (rcu_needs_cpu(cpu))
+ if (rcu_needs_cpu(cpu) || printk_needs_cpu(cpu))
delta_jiffies = 1;
/*
* Do not stop the tick, if we are only one off