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authorOleg Nesterov <oleg@tv-sign.ru>2005-10-26 20:26:53 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-26 15:21:14 -0700
commit7a4ed937aa44acdeb8c6ba671509dc7b54b09d3a (patch)
treeb602abc9445b2c4a10788147c58a28fe1f4e63f7
parente02fd44056dd8077b49b4bd92c5799a75e89cd65 (diff)
downloadlinux-7a4ed937aa44acdeb8c6ba671509dc7b54b09d3a.tar.gz
[PATCH] Fix cpu timers expiration time
There's a silly off-by-one error in the code that updates the expiration of posix CPU timers, causing them to not be properly updated when they hit exactly on their expiration time (which should be the normal case). This causes them to then fire immediately again, and only _then_ get properly updated. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--kernel/posix-cpu-timers.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 2f86424fa51..383ba22f0b6 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -91,7 +91,7 @@ static inline union cpu_time_count cpu_time_sub(clockid_t which_clock,
* Update expiry time from increment, and increase overrun count,
* given the current clock sample.
*/
-static inline void bump_cpu_timer(struct k_itimer *timer,
+static void bump_cpu_timer(struct k_itimer *timer,
union cpu_time_count now)
{
int i;
@@ -110,7 +110,7 @@ static inline void bump_cpu_timer(struct k_itimer *timer,
for (i = 0; incr < delta - incr; i++)
incr = incr << 1;
for (; i >= 0; incr >>= 1, i--) {
- if (delta <= incr)
+ if (delta < incr)
continue;
timer->it.cpu.expires.sched += incr;
timer->it_overrun += 1 << i;
@@ -128,7 +128,7 @@ static inline void bump_cpu_timer(struct k_itimer *timer,
for (i = 0; cputime_lt(incr, cputime_sub(delta, incr)); i++)
incr = cputime_add(incr, incr);
for (; i >= 0; incr = cputime_halve(incr), i--) {
- if (cputime_le(delta, incr))
+ if (cputime_lt(delta, incr))
continue;
timer->it.cpu.expires.cpu =
cputime_add(timer->it.cpu.expires.cpu, incr);