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md raid1: allow writebehind to work on any leg device set WriteMostly

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As the WriteMostly flag can be set on any component device of a RAID1
array, remove the constraint that it only works if set on the first one.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Tested-by: Xiao Ni <xni@redhat.com>
Link: https://lore.kernel.org/r/2a9592bf3340f34bf588eec984b23ee219f3985e.1692013451.git.heinzm@redhat.com
Signed-off-by: Song Liu <song@kernel.org>
This commit is contained in:
Heinz Mauelshagen 2023-08-14 14:01:15 +02:00 committed by Song Liu
parent c069da449a
commit 6b2460e66c
1 changed files with 1 additions and 2 deletions
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3
drivers/md/raid1.c
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@ -1523,8 +1523,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
* Not if there are too many, or cannot
* allocate memory, or a reader on WriteMostly
* is waiting for behind writes to flush */
if (bitmap &&
test_bit(WriteMostly, &rdev->flags) &&
if (bitmap && write_behind &&
(atomic_read(&bitmap->behind_writes)
< mddev->bitmap_info.max_write_behind) &&
!waitqueue_active(&bitmap->behind_wait)) {