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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-10-29 21:18:11 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-10-29 21:18:11 +0100 |
| commit | 73a2bcb0edb9ffb0b007b3546b430e2c6e415eee (patch) | |
| tree | dd84f61589c7dd21b7be973c288611ffe547f21b /kernel | |
| parent | f7402e0361d4472535e07cfca648f2fa81d85cd2 (diff) | |
| download | linux-73a2bcb0edb9ffb0b007b3546b430e2c6e415eee.tar.gz linux-73a2bcb0edb9ffb0b007b3546b430e2c6e415eee.tar.bz2 linux-73a2bcb0edb9ffb0b007b3546b430e2c6e415eee.zip | |
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')
| -rw-r--r-- | kernel/fork.c | 1 |
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 */ |