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authorGuoqing Jiang <guoqing.jiang@cloud.ionos.com>2019-11-27 17:57:50 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-12-17 20:40:03 +0100
commit2e22c56fb8993f9e7f329a29a2fb87585526859d (patch)
treed061cf58a9fba83851dcb346862f0328e7372c30
parentd6000c7fc76e02d259e9e987d960d3404115d693 (diff)
raid5: need to set STRIPE_HANDLE for batch head
[ Upstream commit a7ede3d16808b8f3915c8572d783530a82b2f027 ] With commit 6ce220dd2f8ea71d6afc29b9a7524c12e39f374a ("raid5: don't set STRIPE_HANDLE to stripe which is in batch list"), we don't want to set STRIPE_HANDLE flag for sh which is already in batch list. However, the stripe which is the head of batch list should set this flag, otherwise panic could happen inside init_stripe at BUG_ON(sh->batch_head), it is reproducible with raid5 on top of nvdimm devices per Xiao oberserved. Thanks for Xiao's effort to verify the change. Fixes: 6ce220dd2f8ea ("raid5: don't set STRIPE_HANDLE to stripe which is in batch list") Reported-by: Xiao Ni <xni@redhat.com> Tested-by: Xiao Ni <xni@redhat.com> Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--drivers/md/raid5.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 4c49bed40f1f..d5c14d56a714 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5721,7 +5721,7 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
do_flush = false;
}
- if (!sh->batch_head)
+ if (!sh->batch_head || sh == sh->batch_head)
set_bit(STRIPE_HANDLE, &sh->state);
clear_bit(STRIPE_DELAYED, &sh->state);
if ((!sh->batch_head || sh == sh->batch_head) &&