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author | Oleg Nesterov <oleg@redhat.com> | 2008-11-17 15:40:08 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-11-17 16:55:55 +0100 |
commit | 2b5fe6de58276d0b5a7c884d5dbfc300ca47db78 (patch) | |
tree | 02cc368e46a795bd2c0162d278f9c5549f4e1e5a /kernel/sys.c | |
parent | ce394471d13bf071939a9a0b48c64c297676d233 (diff) | |
download | kernel_samsung_smdk4412-2b5fe6de58276d0b5a7c884d5dbfc300ca47db78.zip kernel_samsung_smdk4412-2b5fe6de58276d0b5a7c884d5dbfc300ca47db78.tar.gz kernel_samsung_smdk4412-2b5fe6de58276d0b5a7c884d5dbfc300ca47db78.tar.bz2 |
thread_group_cputime: move a couple of callsites outside of ->siglock
Impact: relax the locking of cpu-time accounting calls
->siglock buys nothing for thread_group_cputime() in do_sys_times() and
wait_task_zombie() (which btw takes the unrelated parent's ->siglock).
Actually I think do_sys_times() doesn't need ->siglock at all.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sys.c')
-rw-r--r-- | kernel/sys.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 31deba8..5fc3a0c 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -858,8 +858,8 @@ void do_sys_times(struct tms *tms) struct task_cputime cputime; cputime_t cutime, cstime; - spin_lock_irq(¤t->sighand->siglock); thread_group_cputime(current, &cputime); + spin_lock_irq(¤t->sighand->siglock); cutime = current->signal->cutime; cstime = current->signal->cstime; spin_unlock_irq(¤t->sighand->siglock); |