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Merge branch 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md into block-5.16

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Pull MD fix from Song, fixing a raid1 regression with missing bitmap
updates.

* 'md-fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md:
  md/raid1: fix missing bitmap update w/o WriteMostly devices
This commit is contained in:
Jens Axboe 2022-01-03 21:21:11 -07:00
commit 26bc4f019c
1 changed files with 2 additions and 1 deletions
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3
drivers/md/raid1.c
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@ -1496,12 +1496,13 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
if (!r1_bio->bios[i])
continue;
if (first_clone && test_bit(WriteMostly, &rdev->flags)) {
if (first_clone) {
/* do behind I/O ?
* 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) &&
(atomic_read(&bitmap->behind_writes)
< mddev->bitmap_info.max_write_behind) &&
!waitqueue_active(&bitmap->behind_wait)) {