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raid5-cache: handle journal hotadd in quiesce

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Handle journal hotadd in quiesce to avoid creating duplicated threads.

Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This commit is contained in:
Shaohua Li 2016-01-06 14:37:15 -08:00 committed by NeilBrown
parent 87d4d91616
commit 16a43f6a65
1 changed files with 7 additions and 0 deletions
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7
drivers/md/raid5-cache.c
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@ -827,6 +827,13 @@ void r5l_quiesce(struct r5l_log *log, int state)
return; return;
if (state == 0) { if (state == 0) {
log->in_teardown = 0; log->in_teardown = 0;
/*
* This is a special case for hotadd. In suspend, the array has
* no journal. In resume, journal is initialized as well as the
* reclaim thread.
*/
if (log->reclaim_thread)
return;
log->reclaim_thread = md_register_thread(r5l_reclaim_thread, log->reclaim_thread = md_register_thread(r5l_reclaim_thread,
log->rdev->mddev, "reclaim"); log->rdev->mddev, "reclaim");
} else if (state == 1) { } else if (state == 1) {