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migration: introduce self_announce_delay()

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This patch introduces self_announce_delay() to calculate the delay for
the next announce round. This could be used by other device e.g
virtio-net who wants to do announcing by itself.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2014-05-20 14:01:43 +08:00 committed by Michael S. Tsirkin
parent 110f463062
commit 508e1180d3
2 changed files with 9 additions and 1 deletions
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8
include/migration/vmstate.h
View File

@ -780,4 +780,12 @@ void vmstate_register_ram(struct MemoryRegion *memory, DeviceState *dev);
void vmstate_unregister_ram(struct MemoryRegion *memory, DeviceState *dev);
void vmstate_register_ram_global(struct MemoryRegion *memory);
static inline
int64_t self_announce_delay(int round)
{
assert(round < SELF_ANNOUNCE_ROUNDS && round > 0);
/* delay 50ms, 150ms, 250ms, ... */
return 50 + (SELF_ANNOUNCE_ROUNDS - round - 1) * 100;
}
#endif

2
savevm.c
View File

@ -97,7 +97,7 @@ static void qemu_announce_self_once(void *opaque)
if (--count) {
/* delay 50ms, 150ms, 250ms, ... */
timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) +
50 + (SELF_ANNOUNCE_ROUNDS - count - 1) * 100);
self_announce_delay(count));
} else {
timer_del(timer);
timer_free(timer);