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pvclock: detect watchdog reset at pvclock read

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Implement reset of kernel watchdogs at pvclock read time. This avoids
adding special code to every watchdog.

This is possible for watchdogs which measure time based on sched_clock() or
ktime_get() variants.

Suggested by Don Zickus.

Acked-by: Don Zickus <dzickus@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Marcelo Tosatti
2013-10-11 21:39:25 -03:00
committed by Gleb Natapov
parent 01b71917b5
commit d63285e94a
3 changed files with 15 additions and 0 deletions
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arch/x86/kernel/kvmclock.c
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@@ -139,6 +139,7 @@ bool kvm_check_and_clear_guest_paused(void)
src = &hv_clock[cpu].pvti;
if ((src->flags & PVCLOCK_GUEST_STOPPED) != 0) {
src->flags &= ~PVCLOCK_GUEST_STOPPED;
pvclock_touch_watchdogs();
ret = true;
}