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authorNeilBrown <neilb@suse.de>2013-11-19 12:02:01 +1100
committerNeilBrown <neilb@suse.de>2013-11-19 15:19:17 +1100
commitc91abf5a3546a4ff0838d2905f4d7eae2795f724 (patch)
tree39b3735cebfa73ff370f2738bd8578a113fe4215 /drivers/md/raid10.c
parent29f097c4d968021ee4fad1b033be5825ff78330e (diff)
downloadblackbird-op-linux-c91abf5a3546a4ff0838d2905f4d7eae2795f724.tar.gz
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md: use MD_RECOVERY_INTR instead of kthread_should_stop in resync thread.
We currently use kthread_should_stop() in various places in the sync/reshape code to abort early. However some places set MD_RECOVERY_INTR but don't immediately call md_reap_sync_thread() (and we will shortly get another one). When this happens we are relying on md_check_recovery() to reap the thread and that only happen when it finishes normally. So MD_RECOVERY_INTR must lead to a normal finish without the kthread_should_stop() test. So replace all relevant tests, and be more careful when the thread is interrupted not to acknowledge that latest step in a reshape as it may not be fully committed yet. Also add a test on MD_RECOVERY_INTR in the 'is_mddev_idle' loop so we don't wait have to wait for the speed to drop before we can abort. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 73dc8a377522..4f87ba5f3a66 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -4386,7 +4386,11 @@ static sector_t reshape_request(struct mddev *mddev, sector_t sector_nr,
set_bit(MD_CHANGE_DEVS, &mddev->flags);
md_wakeup_thread(mddev->thread);
wait_event(mddev->sb_wait, mddev->flags == 0 ||
- kthread_should_stop());
+ test_bit(MD_RECOVERY_INTR, &mddev->recovery));
+ if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
+ allow_barrier(conf);
+ return sectors_done;
+ }
conf->reshape_safe = mddev->reshape_position;
allow_barrier(conf);
}
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