This is a note to let you know that I've just added the patch titled
md: using GFP_NOIO to allocate bio for flush request
to the 3.0-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:
md-using-gfp_noio-to-allocate-bio-for-flush-request.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From b5e1b8cee7ad58a15d2fa79bcd7946acb592602d Mon Sep 17 00:00:00 2001
From: Shaohua Li <[email protected]>
Date: Mon, 21 May 2012 09:26:59 +1000
Subject: md: using GFP_NOIO to allocate bio for flush request
From: Shaohua Li <[email protected]>
commit b5e1b8cee7ad58a15d2fa79bcd7946acb592602d upstream.
A flush request is usually issued in transaction commit code path, so
using GFP_KERNEL to allocate memory for flush request bio falls into
the classic deadlock issue.
This is suitable for any -stable kernel to which it applies as it
avoids a possible deadlock.
Signed-off-by: Shaohua Li <[email protected]>
Signed-off-by: NeilBrown <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/md/md.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -409,7 +409,7 @@ static void submit_flushes(struct work_s
atomic_inc(&rdev->nr_pending);
atomic_inc(&rdev->nr_pending);
rcu_read_unlock();
- bi = bio_alloc_mddev(GFP_KERNEL, 0, mddev);
+ bi = bio_alloc_mddev(GFP_NOIO, 0, mddev);
bi->bi_end_io = md_end_flush;
bi->bi_private = rdev;
bi->bi_bdev = rdev->bdev;
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/md-using-gfp_noio-to-allocate-bio-for-flush-request.patch
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