Hot add journal disk in recovery thread context brings a lot of trouble
as IO could be running. Unlike spare disk hot add, adding journal disk
with array suspended makes more sense and implmentation is much easier.
Signed-off-by: Shaohua Li <shli@xxxxxx>
---
drivers/md/md.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index e896320..dad9a25 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2464,15 +2464,20 @@ static int add_bound_rdev(struct md_rdev *rdev)
{
struct mddev *mddev = rdev->mddev;
int err = 0;
+ bool add_journal = test_bit(Journal, &rdev->flags);
- if (!mddev->pers->hot_remove_disk) {
+ if (!mddev->pers->hot_remove_disk || add_journal) {
/* If there is hot_add_disk but no hot_remove_disk
* then added disks for geometry changes,
* and should be added immediately.
*/
super_types[mddev->major_version].
validate_super(mddev, rdev);
+ if (add_journal)
+ mddev_suspend(mddev);
err = mddev->pers->hot_add_disk(mddev, rdev);
+ if (add_journal)
+ mddev_resume(mddev);
if (err) {
unbind_rdev_from_array(rdev);
export_rdev(rdev);
--
2.4.6
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