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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2007-10-29 23:18:11 +0300
committerIngo Molnar <mingo@elte.hu>2007-10-29 23:18:11 +0300
commit73a2bcb0edb9ffb0b007b3546b430e2c6e415eee (patch)
treedd84f61589c7dd21b7be973c288611ffe547f21b /kernel/fork.c
parentf7402e0361d4472535e07cfca648f2fa81d85cd2 (diff)
downloadlinux-73a2bcb0edb9ffb0b007b3546b430e2c6e415eee.tar.xz
sched: keep utime/stime monotonic
keep utime/stime monotonic. cpustats use utime/stime as a ratio against sum_exec_runtime, as a consequence it can happen - when the ratio changes faster than time accumulates - that either can be appear to go backwards. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index ddafdfac9456..a65bfc47177c 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1056,6 +1056,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->gtime = cputime_zero;
p->utimescaled = cputime_zero;
p->stimescaled = cputime_zero;
+ p->prev_utime = cputime_zero;
#ifdef CONFIG_TASK_XACCT
p->rchar = 0; /* I/O counter: bytes read */