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qemu_rearm_alarm_timer: do not call rearm if the next deadline is INT64_MAX 

qemu_rearm_alarm_timer partially duplicates the code in
qemu_next_alarm_deadline to figure out if it needs to rearm the timer.
If it calls qemu_next_alarm_deadline, it always rearms the timer even if
the next deadline is INT64_MAX.

This patch simplifies the behavior of qemu_rearm_alarm_timer and removes
the duplicated code, always calling qemu_next_alarm_deadline and only
rearming the timer if the deadline is less than INT64_MAX.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Tested-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
master
Stefano Stabellini 2012-05-29 03:35:24 +00:00 committed by Blue Swirl
parent 82e5d46414
commit 8227421e04
1 changed files with 3 additions and 7 deletions
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10
qemu-timer.c
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@ -112,14 +112,10 @@ static int64_t qemu_next_alarm_deadline(void)
static void qemu_rearm_alarm_timer(struct qemu_alarm_timer *t)
{
int64_t nearest_delta_ns;
if (!rt_clock->active_timers &&
!vm_clock->active_timers &&
!host_clock->active_timers) {
return;
int64_t nearest_delta_ns = qemu_next_alarm_deadline();
if (nearest_delta_ns < INT64_MAX) {
t->rearm(t, nearest_delta_ns);
}
nearest_delta_ns = qemu_next_alarm_deadline();
t->rearm(t, nearest_delta_ns);
}
/* TODO: MIN_TIMER_REARM_NS should be optimized */