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| author | attilio <attilio@FreeBSD.org> | 2007-06-09 21:48:44 +0000 |
|---|---|---|
| committer | attilio <attilio@FreeBSD.org> | 2007-06-09 21:48:44 +0000 |
| commit | 12d804e413f2c44d9e10f25ee1b546f2b48c598b (patch) | |
| tree | 7fca182049d1ed6ecc1c3b117e1d77c681c922c3 /sys/kern/kern_time.c | |
| parent | 82a09af23776643f85a5e710a09bef3be83823d9 (diff) | |
| download | FreeBSD-src-12d804e413f2c44d9e10f25ee1b546f2b48c598b.zip FreeBSD-src-12d804e413f2c44d9e10f25ee1b546f2b48c598b.tar.gz | |
rufetch and calcru sometimes should be called atomically together.
This patch fixes places where they should be called atomically changing
their locking requirements (both assume per-proc spinlock held) and
introducing rufetchcalc which wrappers both calls to be performed in
atomic way.
Reviewed by: jeff
Approved by: jeff (mentor)
Diffstat (limited to 'sys/kern/kern_time.c')
| -rw-r--r-- | sys/kern/kern_time.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/kern/kern_time.c b/sys/kern/kern_time.c index 8634c8a..e220cd6 100644 --- a/sys/kern/kern_time.c +++ b/sys/kern/kern_time.c @@ -213,13 +213,17 @@ kern_clock_gettime(struct thread *td, clockid_t clock_id, struct timespec *ats) break; case CLOCK_VIRTUAL: PROC_LOCK(p); + PROC_SLOCK(p); calcru(p, &user, &sys); + PROC_SUNLOCK(p); PROC_UNLOCK(p); TIMEVAL_TO_TIMESPEC(&user, ats); break; case CLOCK_PROF: PROC_LOCK(p); + PROC_SLOCK(p); calcru(p, &user, &sys); + PROC_SUNLOCK(p); PROC_UNLOCK(p); timevaladd(&user, &sys); TIMEVAL_TO_TIMESPEC(&user, ats); |
