Re: [PATCH] raid0: Set discard_granularity to correct value after reshape.
From: NeilBrown <hidden>
Date: 2013-10-31 00:16:29
Also in:
lkml
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
On Wed, 30 Oct 2013 13:20:22 +0100 Pawel Baldysiak [off-list ref] wrote:
quoted hunk ↗ jump to hunk
In case of reshape of raid0 through raid4 a value of discard_granularity will be set to stripe size. MD driver should re-set this value to correct one when migration will be finished. Otherwise array will be left with wrong value and discard operations will not work properly. Signed-off-by: Pawel Baldysiak <redacted> Cc: Shaohua Li <shli@kernel.org> --- drivers/md/raid0.c | 2 ++ 1 file changed, 2 insertions(+)diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index c4d420b..807ca3a 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c@@ -266,6 +266,8 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf) } mddev->queue->backing_dev_info.congested_fn = raid0_congested; mddev->queue->backing_dev_info.congested_data = mddev; + mddev->queue->limits.discard_granularity = + queue_logical_block_size(mddev->queue); /* * now since we have the hard sector sizes, we can make sure
Thanks, but this doesn't seem like the right sort of fix. It is to specific to the symptom rather than trying to address the underlying problem. Maybe something like this? Can you review and test? Thanks, NeilBrown
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 628cd529343f..740b6340f980 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c@@ -3620,6 +3620,7 @@ level_store(struct mddev *mddev, const char *buf, size_t len) mddev->in_sync = 1; del_timer_sync(&mddev->safemode_timer); } + blk_set_stacking_limit(&mddev->queue->limits); pers->run(mddev); set_bit(MD_CHANGE_DEVS, &mddev->flags); mddev_resume(mddev);
Attachments
- signature.asc [application/pgp-signature] 828 bytes