From 87d4d91616e4db9b8293ba9d9e5a2f3f0d0c8aa6 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Wed, 6 Jan 2016 14:37:14 -0800 Subject: MD: add journal with array suspended 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 Signed-off-by: NeilBrown --- 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 29a4bbf62be5..8753dee3983b 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2455,15 +2455,20 @@ 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); -- cgit v1.2.3