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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/timer.c
parent796aadeb1b2db9b5d463946766c5bbfd7717158c (diff)
downloadlwn-b845b517b5e3706a3729f6ea83b88ab85f0725b0.tar.gz
lwn-b845b517b5e3706a3729f6ea83b88ab85f0725b0.zip
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/timer.c')
-rw-r--r--kernel/timer.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/timer.c b/kernel/timer.c
index 03bc7f1f1593..510fe69351ca 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -978,6 +978,7 @@ void update_process_times(int user_tick)
run_local_timers();
if (rcu_pending(cpu))
rcu_check_callbacks(cpu, user_tick);
+ printk_tick();
scheduler_tick();
run_posix_cpu_timers(p);
}