aboutsummaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-01-05 11:28:22 +0100
committerIngo Molnar <mingo@elte.hu>2009-01-05 13:14:33 +0100
commita6037b61c2f5fc99c57c15b26d7cfa58bbb34008 (patch)
treeb076de5cc8a75e4227f96dda31a0daa6e895579b /include
parent731a55ba0f17064f85903b7bf8e24849ec6cfa20 (diff)
downloadmrst-s0i3-test-a6037b61c2f5fc99c57c15b26d7cfa58bbb34008.tar.gz
mrst-s0i3-test-a6037b61c2f5fc99c57c15b26d7cfa58bbb34008.tar.xz
mrst-s0i3-test-a6037b61c2f5fc99c57c15b26d7cfa58bbb34008.zip
hrtimer: fix recursion deadlock by re-introducing the softirq
Impact: fix rare runtime deadlock There are a few sites that do: spin_lock_irq(&foo) hrtimer_start(&bar) __run_hrtimer(&bar) func() spin_lock(&foo) which obviously deadlocks. In order to avoid this, never call __run_hrtimer() from hrtimer_start*() context, but instead defer this to softirq context. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
-rw-r--r--include/linux/interrupt.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 0702c4d7bdf..2062833f5f7 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -253,7 +253,8 @@ enum
BLOCK_SOFTIRQ,
TASKLET_SOFTIRQ,
SCHED_SOFTIRQ,
- RCU_SOFTIRQ, /* Preferable RCU should always be the last softirq */
+ HRTIMER_SOFTIRQ,
+ RCU_SOFTIRQ, /* Preferable RCU should always be the last softirq */
NR_SOFTIRQS
};