From 3a3a5ddb7a0f43c3dd0f98673f3d930a456725f8 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 16 Aug 2010 18:09:31 +1000 Subject: [PATCH] Update recovery_offset even when external metadata is used. The update of ->recovery_offset in sync_sbs is appropriate even then external metadata is in use. However sync_sbs is only called when native metadata is used. So move that update in to the top of md_update_sb (which is the only caller of sync_sbs) before the test on ->external. This moves the update out of ->write_lock protection, but those fields only need ->reconfig_mutex protection which they still have. Also move the test on ->persistent up to where ->external is set as for metadata update purposes they are the same. Clear MD_CHANGE_DEVS and MD_CHANGE_CLEAN as they can only be confusing if ->external is set or ->persistent isn't. Finally move the update of ->utime down as it is only relevent (like the ->events update) for native metadata. Signed-off-by: NeilBrown Reported-by: "Kwolek, Adam" --- drivers/md/md.c | 44 ++++++++++++++++++-------------------------- 1 file changed, 18 insertions(+), 26 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 11567c7999a2..c148b6302154 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2136,16 +2136,6 @@ static void sync_sbs(mddev_t * mddev, int nospares) * with the rest of the array) */ mdk_rdev_t *rdev; - - /* First make sure individual recovery_offsets are correct */ - list_for_each_entry(rdev, &mddev->disks, same_set) { - if (rdev->raid_disk >= 0 && - mddev->delta_disks >= 0 && - !test_bit(In_sync, &rdev->flags) && - mddev->curr_resync_completed > rdev->recovery_offset) - rdev->recovery_offset = mddev->curr_resync_completed; - - } list_for_each_entry(rdev, &mddev->disks, same_set) { if (rdev->sb_events == mddev->events || (nospares && @@ -2167,12 +2157,27 @@ static void md_update_sb(mddev_t * mddev, int force_change) int sync_req; int nospares = 0; - mddev->utime = get_seconds(); - if (mddev->external) - return; repeat: + /* First make sure individual recovery_offsets are correct */ + list_for_each_entry(rdev, &mddev->disks, same_set) { + if (rdev->raid_disk >= 0 && + mddev->delta_disks >= 0 && + !test_bit(In_sync, &rdev->flags) && + mddev->curr_resync_completed > rdev->recovery_offset) + rdev->recovery_offset = mddev->curr_resync_completed; + + } + if (mddev->external || !mddev->persistent) { + clear_bit(MD_CHANGE_DEVS, &mddev->flags); + clear_bit(MD_CHANGE_CLEAN, &mddev->flags); + wake_up(&mddev->sb_wait); + return; + } + spin_lock_irq(&mddev->write_lock); + mddev->utime = get_seconds(); + set_bit(MD_CHANGE_PENDING, &mddev->flags); if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags)) force_change = 1; @@ -2221,19 +2226,6 @@ static void md_update_sb(mddev_t * mddev, int force_change) MD_BUG(); mddev->events --; } - - /* - * do not write anything to disk if using - * nonpersistent superblocks - */ - if (!mddev->persistent) { - if (!mddev->external) - clear_bit(MD_CHANGE_PENDING, &mddev->flags); - - spin_unlock_irq(&mddev->write_lock); - wake_up(&mddev->sb_wait); - return; - } sync_sbs(mddev, nospares); spin_unlock_irq(&mddev->write_lock); -- GitLab