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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2013-03-27 14:08:47 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-06-05 10:30:19 -0400 |
| commit | 28e35a583ea13fd452c0478c8166f5970d243d04 (patch) | |
| tree | d1f35b32a49efc2c3296708ea71886d38efdd1ff /drivers/block | |
| parent | 180a003005b490cf9f2c6a9734fa1449fceb5d21 (diff) | |
| download | linux-rt-28e35a583ea13fd452c0478c8166f5970d243d04.tar.gz | |
drbd: fix for deadlock when using automatic split-brain-recovery
[ Upstream commit 7c689e63a847316c1b2500f86891b0a574ce7e69 ]
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: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'drivers/block')
| -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 c74ca2df7431..490b759c88b4 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -2271,7 +2271,6 @@ 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. */ |