This is a note to let you know that I've just added the patch titled
dm thin: disable discard support for thin devices if pool's is disabled
to the 4.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
dm-thin-disable-discard-support-for-thin-devices-if-pool-s-is-disabled.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 216076705d6ac291d42e0f8dd85e6a0da98c0fa3 Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@xxxxxxxxxx>
Date: Tue, 8 Sep 2015 08:56:13 -0400
Subject: dm thin: disable discard support for thin devices if pool's is disabled
From: Mike Snitzer <snitzer@xxxxxxxxxx>
commit 216076705d6ac291d42e0f8dd85e6a0da98c0fa3 upstream.
If the pool is configured with 'ignore_discard' its discard support is
disabled. The pool's thin devices should also have queue_limits that
reflect discards are disabled.
Fixes: 34fbcf62 ("dm thin: range discard support")
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-thin.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/md/dm-thin.c
+++ b/drivers/md/dm-thin.c
@@ -4333,6 +4333,10 @@ static void thin_io_hints(struct dm_targ
{
struct thin_c *tc = ti->private;
struct pool *pool = tc->pool;
+ struct queue_limits *pool_limits = dm_get_queue_limits(pool->pool_md);
+
+ if (!pool_limits->discard_granularity)
+ return; /* pool's discard support is disabled */
limits->discard_granularity = pool->sectors_per_block << SECTOR_SHIFT;
limits->max_discard_sectors = 2048 * 1024 * 16; /* 16G */
Patches currently in stable-queue which might be from snitzer@xxxxxxxxxx are
queue-4.2/dm-crypt-constrain-crypt-device-s-max_segment_size-to-page_size.patch
queue-4.2/dm-thin-disable-discard-support-for-thin-devices-if-pool-s-is-disabled.patch
queue-4.2/dm-raid-fix-round-up-of-default-region-size.patch
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html