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qed: Don't yield in bdrv_qed_co_drain_begin() 

We want to change .bdrv_co_drained_begin() back to be a non-coroutine
callback, so in preparation, avoid yielding in its implementation.

Because we increase bs->in_flight and bdrv_drained_begin() polls, the
behaviour is unchanged.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20221118174110.55183-2-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2022-11-18 18:40:56 +01:00
parent fb0ff4d1ba
commit 6d47eb0c8b
1 changed files with 17 additions and 3 deletions
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20
block/qed.c
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@ -282,9 +282,8 @@ static void coroutine_fn qed_unplug_allocating_write_reqs(BDRVQEDState *s)
qemu_co_mutex_unlock(&s->table_lock);
}
static void coroutine_fn qed_need_check_timer_entry(void *opaque)
static void coroutine_fn qed_need_check_timer(BDRVQEDState *s)
{
BDRVQEDState *s = opaque;
int ret;
trace_qed_need_check_timer_cb(s);
@ -310,9 +309,20 @@ static void coroutine_fn qed_need_check_timer_entry(void *opaque)
(void) ret;
}
static void coroutine_fn qed_need_check_timer_entry(void *opaque)
{
BDRVQEDState *s = opaque;
qed_need_check_timer(opaque);
bdrv_dec_in_flight(s->bs);
}
static void qed_need_check_timer_cb(void *opaque)
{
BDRVQEDState *s = opaque;
Coroutine *co = qemu_coroutine_create(qed_need_check_timer_entry, opaque);
bdrv_inc_in_flight(s->bs);
qemu_coroutine_enter(co);
}
@ -363,8 +373,12 @@ static void coroutine_fn bdrv_qed_co_drain_begin(BlockDriverState *bs)
* header is flushed.
*/
if (s->need_check_timer && timer_pending(s->need_check_timer)) {
Coroutine *co;
qed_cancel_need_check_timer(s);
qed_need_check_timer_entry(s);
co = qemu_coroutine_create(qed_need_check_timer_entry, s);
bdrv_inc_in_flight(bs);
aio_co_enter(bdrv_get_aio_context(bs), co);
}
}