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| author |   Balbir Singh <balbir@linux.vnet.ibm.com> | 2007-10-30 00:26:32 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2007-10-30 00:26:32 +0100 |
| commit | 9301899be75b464ef097f0b5af7af6d9bd8f68a7 (patch) | |
| tree | a7053c5c0babcdbad6d4baff0551d60e5c4308af | |
| parent | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus (diff) | |
| download | linux-dev-9301899be75b464ef097f0b5af7af6d9bd8f68a7.tar.xz linux-dev-9301899be75b464ef097f0b5af7af6d9bd8f68a7.zip | |
sched: fix /proc/<PID>/stat stime/utime monotonicity, part 2
Extend Peter's patch to fix accounting issues, by keeping stime
monotonic too.
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Tested-by: Frans Pop <elendil@planet.nl>
| -rw-r--r-- | fs/proc/array.c | 3 | ||||
| -rw-r--r-- | include/linux/sched.h | 2 | ||||
| -rw-r--r-- | kernel/fork.c | 1 |
3 files changed, 4 insertions, 2 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c index d80baaabf835..eba339ecba27 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -374,7 +374,8 @@ static cputime_t task_stime(struct task_struct *p) stime = nsec_to_clock_t(p->se.sum_exec_runtime) - cputime_to_clock_t(task_utime(p)); - return clock_t_to_cputime(stime); + p->prev_stime = max(p->prev_stime, clock_t_to_cputime(stime)); + return p->prev_stime; } #endif diff --git a/include/linux/sched.h b/include/linux/sched.h index b0b1fe6e0b17..155d7438f7ad 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1009,7 +1009,7 @@ struct task_struct { unsigned int rt_priority; cputime_t utime, stime, utimescaled, stimescaled; cputime_t gtime; - cputime_t prev_utime; + cputime_t prev_utime, prev_stime; unsigned long nvcsw, nivcsw; /* context switch counts */ struct timespec start_time; /* monotonic time */ struct timespec real_start_time; /* boot based time */ diff --git a/kernel/fork.c b/kernel/fork.c index a65bfc47177c..28a740151988 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1057,6 +1057,7 @@ static struct task_struct *copy_process(unsigned long clone_flags, p->utimescaled = cputime_zero; p->stimescaled = cputime_zero; p->prev_utime = cputime_zero; + p->prev_stime = cputime_zero; #ifdef CONFIG_TASK_XACCT p->rchar = 0; /* I/O counter: bytes read */ |