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This fix prevents hangs when a drive leaves a throttling group.
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Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Pull request

This fix prevents hangs when a drive leaves a throttling group.

# gpg: Signature made Thu 19 Jul 2018 15:28:37 BST
# gpg:                using RSA key 9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha/tags/block-pull-request:
  throttle-groups: fix hang when group member leaves

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-07-19 15:38:06 +01:00
commit e1ea55668f
1 changed files with 4 additions and 0 deletions
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4
block/throttle-groups.c
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@ -564,6 +564,10 @@ void throttle_group_unregister_tgm(ThrottleGroupMember *tgm)
qemu_mutex_lock(&tg->lock);
for (i = 0; i < 2; i++) {
if (timer_pending(tgm->throttle_timers.timers[i])) {
tg->any_timer_armed[i] = false;
schedule_next_request(tgm, i);
}
if (tg->tokens[i] == tgm) {
token = throttle_group_next_tgm(tgm);
/* Take care of the case where this is the last tgm in the group */