Messages in this thread Patch in this message | | | Date | Tue, 14 Feb 2006 11:10:45 +0100 (CET) | From | Roman Zippel <> | Subject | [PATCH 01/12] hrtimer: round up relative start time |
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When starting a relative timer we have to round it up the next clock tick to avoid an early expiry. The problem is that we don't know the real clock resolution, so we have to assume the worst case, but it's basically the same as the old code did, so it won't be worse than 2.6.15 and with a better clock interface we can improve this.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
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kernel/hrtimer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
Index: linux-2.6-git/kernel/hrtimer.c =================================================================== --- linux-2.6-git.orig/kernel/hrtimer.c 2006-02-13 22:29:45.000000000 +0100 +++ linux-2.6-git/kernel/hrtimer.c 2006-02-13 22:29:51.000000000 +0100 @@ -419,7 +419,8 @@ hrtimer_start(struct hrtimer *timer, kti new_base = switch_hrtimer_base(timer, base); if (mode == HRTIMER_REL) - tim = ktime_add(tim, new_base->get_time()); + tim = ktime_add(ktime_add(tim, new_base->get_time()), + base->resolution); timer->expires = tim; enqueue_hrtimer(timer, new_base); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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