diff options
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 2cb49f639809..68de2a6ee29a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -266,16 +266,31 @@ static DEFINE_SPINLOCK(all_mddevs_lock); * call has finished, the bio has been linked into some internal structure * and so is visible to ->quiesce(), so we don't need the refcount any more. */ +static bool is_suspended(struct mddev *mddev, struct bio *bio) +{ + if (mddev->suspended) + return true; + if (bio_data_dir(bio) != WRITE) + return false; + if (mddev->suspend_lo >= mddev->suspend_hi) + return false; + if (bio->bi_iter.bi_sector >= mddev->suspend_hi) + return false; + if (bio_end_sector(bio) < mddev->suspend_lo) + return false; + return true; +} + void md_handle_request(struct mddev *mddev, struct bio *bio) { check_suspended: rcu_read_lock(); - if (mddev->suspended) { + if (is_suspended(mddev, bio)) { DEFINE_WAIT(__wait); for (;;) { prepare_to_wait(&mddev->sb_wait, &__wait, TASK_UNINTERRUPTIBLE); - if (!mddev->suspended) + if (!is_suspended(mddev, bio)) break; rcu_read_unlock(); schedule(); @@ -4845,10 +4860,11 @@ suspend_lo_store(struct mddev *mddev, const char *buf, size_t len) goto unlock; old = mddev->suspend_lo; mddev->suspend_lo = new; - if (new >= old) + if (new >= old) { /* Shrinking suspended region */ + wake_up(&mddev->sb_wait); mddev->pers->quiesce(mddev, 2); - else { + } else { /* Expanding suspended region - need to wait */ mddev->pers->quiesce(mddev, 1); mddev->pers->quiesce(mddev, 0); @@ -4888,10 +4904,11 @@ suspend_hi_store(struct mddev *mddev, const char *buf, size_t len) goto unlock; old = mddev->suspend_hi; mddev->suspend_hi = new; - if (new <= old) + if (new <= old) { /* Shrinking suspended region */ + wake_up(&mddev->sb_wait); mddev->pers->quiesce(mddev, 2); - else { + } else { /* Expanding suspended region - need to wait */ mddev->pers->quiesce(mddev, 1); mddev->pers->quiesce(mddev, 0); |