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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2013-03-27 14:08:47 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-05-30 14:35:10 +0100 |
| commit | 9c4254fbab06989a943eb5633cf6dd1bd6b79d6b (patch) | |
| tree | 0febf7177c5f8c4225e546fd37b65af39a1c80db | |
| parent | 99f9dba9919c903f04eec1001b5634e3e8bb40cb (diff) | |
| download | linux-stable-9c4254fbab06989a943eb5633cf6dd1bd6b79d6b.tar.gz linux-stable-9c4254fbab06989a943eb5633cf6dd1bd6b79d6b.tar.bz2 linux-stable-9c4254fbab06989a943eb5633cf6dd1bd6b79d6b.zip | |
drbd: fix for deadlock when using automatic split-brain-recovery
commit 7c689e63a847316c1b2500f86891b0a574ce7e69 upstream.
With an automatic after split-brain recovery policy of
"after-sb-1pri call-pri-lost-after-sb",
when trying to drbd_set_role() to R_SECONDARY,
we run into a deadlock.
This was first recognized and supposedly fixed by
2009-06-10 "Fixed a deadlock when using automatic split brain recovery when both nodes are"
replacing drbd_set_role() with drbd_change_state() in that code-path,
but the first hunk of that patch forgets to remove the drbd_set_role().
We apparently only ever tested the "two primaries" case.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 43beaca53179..13cbdd328956 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -2225,7 +2225,6 @@ static int drbd_asb_recover_1p(struct drbd_conf *mdev) __must_hold(local) if (hg == -1 && mdev->state.role == R_PRIMARY) { enum drbd_state_rv rv2; - drbd_set_role(mdev, R_SECONDARY, 0); /* drbd_change_state() does not sleep while in SS_IN_TRANSIENT_STATE, * we might be here in C_WF_REPORT_PARAMS which is transient. * we do not need to wait for the after state change work either. */ |