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| author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-13 16:34:48 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2012-03-13 16:35:16 +0100 |
| commit | df8d291f28aa1e8437c8f7816328a6516379c71b (patch) | |
| tree | 26ae585aa259584ddd0d9088933547c065c37086 /kernel/hung_task.c | |
| parent | genirq: Get rid of unnecessary IRQTF_DIED flag (diff) | |
| parent | Linux 3.3-rc7 (diff) | |
| download | linux-df8d291f28aa1e8437c8f7816328a6516379c71b.tar.gz linux-df8d291f28aa1e8437c8f7816328a6516379c71b.zip | |
Merge branch 'linus' into irq/core
Reason: Get upstream fixes integrated before further modifications.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/hung_task.c')
| -rw-r--r-- | kernel/hung_task.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/hung_task.c b/kernel/hung_task.c index 2e48ec0c2e91..c21449f85a2a 100644 --- a/kernel/hung_task.c +++ b/kernel/hung_task.c @@ -119,15 +119,20 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout) * For preemptible RCU it is sufficient to call rcu_read_unlock in order * to exit the grace period. For classic RCU, a reschedule is required. */ -static void rcu_lock_break(struct task_struct *g, struct task_struct *t) +static bool rcu_lock_break(struct task_struct *g, struct task_struct *t) { + bool can_cont; + get_task_struct(g); get_task_struct(t); rcu_read_unlock(); cond_resched(); rcu_read_lock(); + can_cont = pid_alive(g) && pid_alive(t); put_task_struct(t); put_task_struct(g); + + return can_cont; } /* @@ -154,9 +159,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout) goto unlock; if (!--batch_count) { batch_count = HUNG_TASK_BATCHING; - rcu_lock_break(g, t); - /* Exit if t or g was unhashed during refresh. */ - if (t->state == TASK_DEAD || g->state == TASK_DEAD) + if (!rcu_lock_break(g, t)) goto unlock; } /* use "==" to skip the TASK_KILLABLE tasks waiting on NFS */ |