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Flush IO requests before savevm (original patch by Blue Swirl).

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2140 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2006-09-03 12:08:37 +00:00
parent a917d384ac
commit 6192bc374f
3 changed files with 18 additions and 0 deletions
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11
block-raw.c
View file

@ -247,6 +247,17 @@ void qemu_aio_poll(void)
the_end: ;
}
/* Wait for all IO requests to complete. */
void qemu_aio_flush(void)
{
qemu_aio_wait_start();
qemu_aio_poll();
while (first_aio) {
qemu_aio_wait();
}
qemu_aio_wait_end();
}
/* wait until at least one AIO was handled */
static sigset_t wait_oset;

6
vl.c
View file

@ -4551,6 +4551,9 @@ void do_savevm(const char *name)
return;
}
/* ??? Should this occur after vm_stop? */
qemu_aio_flush();
saved_vm_running = vm_running;
vm_stop(0);
@ -4641,6 +4644,9 @@ void do_loadvm(const char *name)
return;
}
/* Flush all IO requests so they don't interfere with the new state. */
qemu_aio_flush();
saved_vm_running = vm_running;
vm_stop(0);

1
vl.h
View file

@ -580,6 +580,7 @@ void bdrv_aio_cancel(BlockDriverAIOCB *acb);
void qemu_aio_init(void);
void qemu_aio_poll(void);
void qemu_aio_flush(void);
void qemu_aio_wait_start(void);
void qemu_aio_wait(void);
void qemu_aio_wait_end(void);