From ca531a0a5e01e5122f67cb6aca8fcbfc70e18e0b Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Mon, 24 Oct 2005 14:36:28 +0400
Subject: [PATCH] [PATCH] posix-timers: exit path cleanup
No need to rebalance when task exited
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
kernel/posix-cpu-timers.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index ccb04683bf18..92a038064628 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -486,6 +486,9 @@ static void process_timer_rebalance(struct task_struct *p,
struct task_struct *t = p;
unsigned int nthreads = atomic_read(&p->signal->live);
+ if (!nthreads)
+ return;
+
switch (clock_idx) {
default:
BUG();
@@ -1160,6 +1163,9 @@ static void check_process_timers(struct task_struct *tsk,
unsigned long long sched_left, sched;
const unsigned int nthreads = atomic_read(&sig->live);
+ if (!nthreads)
+ return;
+
prof_left = cputime_sub(prof_expires, utime);
prof_left = cputime_sub(prof_left, stime);
prof_left = cputime_div(prof_left, nthreads);
--
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