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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-08-30 21:08:40 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-09-02 10:49:51 -0700 |
| commit | cbaed698f37494b30b2449b51c728ae48630cb2b (patch) | |
| tree | 470908bdfe0a5f6e5321c0e1010e80ebced701a4 | |
| parent | 6781f4ae30bbb8ebf31187b3c9304be16966f5a0 (diff) | |
| download | linux-cbaed698f37494b30b2449b51c728ae48630cb2b.tar.gz linux-cbaed698f37494b30b2449b51c728ae48630cb2b.tar.bz2 linux-cbaed698f37494b30b2449b51c728ae48630cb2b.zip | |
softlockup: minor cleanup, don't check task->state twice
The recent commit 16d9679f33caf7e683471647d1472bfe133d858 changed
check_hung_task() to filter out the TASK_KILLABLE tasks. We can
move this check to the caller which has to test t->state anyway.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Acked-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/softlockup.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c index 1a07f8ca4b92..cb838ee93a82 100644 --- a/kernel/softlockup.c +++ b/kernel/softlockup.c @@ -180,10 +180,6 @@ static void check_hung_task(struct task_struct *t, unsigned long now) if (t->flags & PF_FROZEN) return; - /* Don't check for tasks waiting on network file systems like NFS */ - if (t->state & TASK_KILLABLE) - return; - if (switch_count != t->last_switch_count || !t->last_switch_timestamp) { t->last_switch_count = switch_count; t->last_switch_timestamp = now; @@ -237,7 +233,8 @@ static void check_hung_uninterruptible_tasks(int this_cpu) do_each_thread(g, t) { if (!--max_count) goto unlock; - if (t->state & TASK_UNINTERRUPTIBLE) + /* use "==" to skip the TASK_KILLABLE tasks waiting on NFS */ + if (t->state == TASK_UNINTERRUPTIBLE) check_hung_task(t, now); } while_each_thread(g, t); unlock: |