From: Yu Kuai <yukuai3@xxxxxxxxxx>
So that io won't concurrent with array reconfiguration, and it's safe to
suspend the array directly because normal io won't rely on
md_start_sync().
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/md.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 305694b67fd7..0bb4c59543aa 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -9457,6 +9457,12 @@ static void md_start_sync(struct work_struct *ws)
{
struct mddev *mddev = container_of(ws, struct mddev, sync_work);
int spares = 0;
+ bool suspended = false;
+
+ if (md_spares_need_change(mddev)) {
+ __mddev_suspend(mddev);
+ suspended = true;
+ }
mddev_lock_nointr(mddev);
@@ -9495,6 +9501,9 @@ static void md_start_sync(struct work_struct *ws)
}
mddev_unlock(mddev);
+ if (suspended)
+ __mddev_resume(mddev);
+
md_wakeup_thread(mddev->sync_thread);
sysfs_notify_dirent_safe(mddev->sysfs_action);
md_new_event();
@@ -9507,6 +9516,8 @@ static void md_start_sync(struct work_struct *ws)
clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
clear_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
mddev_unlock(mddev);
+ if (suspended)
+ __mddev_resume(mddev);
wake_up(&resync_wait);
if (test_and_clear_bit(MD_RECOVERY_RECOVER, &mddev->recovery) &&
--
2.39.2
