diff options
| author | Hanna Reitz <hreitz@redhat.com> | 2021-10-06 17:19:37 +0200 |
|---|---|---|
| committer | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2021-10-07 10:42:50 +0200 |
| commit | 4feeec7e23b4151c962cb1b9f1a0e403803dfaee (patch) | |
| tree | e8bcf7cc8fd87263956c4988356ca1bb5808206d /block/mirror.c | |
| parent | 20ad4d204accb27346b05b046ee8225c6725ef49 (diff) | |
| download | qemu-4feeec7e23b4151c962cb1b9f1a0e403803dfaee.zip qemu-4feeec7e23b4151c962cb1b9f1a0e403803dfaee.tar.gz qemu-4feeec7e23b4151c962cb1b9f1a0e403803dfaee.tar.bz2 | |
mirror: Check job_is_cancelled() earlier
We must check whether the job is force-cancelled early in our main loop,
most importantly before any `continue` statement. For example, we used
to have `continue`s before our current checking location that are
triggered by `mirror_flush()` failing. So, if `mirror_flush()` kept
failing, force-cancelling the job would not terminate it.
Jobs can be cancelled while they yield, and once they are
(force-cancelled), they should not generate new I/O requests.
Therefore, we should put the check after the last yield before
mirror_iteration() is invoked.
Buglink: https://gitlab.com/qemu-project/qemu/-/issues/462
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211006151940.214590-11-hreitz@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Diffstat (limited to 'block/mirror.c')
| -rw-r--r-- | block/mirror.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/block/mirror.c b/block/mirror.c index 0eaba88..3393ede 100644 --- a/block/mirror.c +++ b/block/mirror.c @@ -1007,6 +1007,11 @@ static int coroutine_fn mirror_run(Job *job, Error **errp) job_pause_point(&s->common.job); + if (job_is_cancelled(&s->common.job)) { + ret = 0; + goto immediate_exit; + } + cnt = bdrv_get_dirty_count(s->dirty_bitmap); /* cnt is the number of dirty bytes remaining and s->bytes_in_flight is * the number of bytes currently being processed; together those are @@ -1085,8 +1090,6 @@ static int coroutine_fn mirror_run(Job *job, Error **errp) break; } - ret = 0; - if (job_is_ready(&s->common.job) && !should_complete) { delay_ns = (s->in_flight == 0 && cnt == 0 ? BLOCK_JOB_SLICE_TIME : 0); @@ -1094,9 +1097,6 @@ static int coroutine_fn mirror_run(Job *job, Error **errp) trace_mirror_before_sleep(s, cnt, job_is_ready(&s->common.job), delay_ns); job_sleep_ns(&s->common.job, delay_ns); - if (job_is_cancelled(&s->common.job)) { - break; - } s->last_pause_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME); } |