[PATCH] md: Add two chances to update sync/recovery checkpoint

["Jianpeng Ma" <majianpeng@gmail.com>]

According commit 97e4f42d62badb0f9fbc27c013e89,it has 16 times to update
checkpoint of sync/recovery in func md_do_sync().
Because the the size of HDD became larger,the time of sync/recovery may
taken long times.So the 1/16 of time maybe half hour or more.
So it should add chance to update checkpoint.
There are places which can update checkpoint in md_do_sync.
1: If call cond_resched and really sched
2: If curr_speed is larger than max_sync_spedd
If above conditions are ok, we can try to update checkpoint.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
---
 drivers/md/md.c |   16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 3f6203a..c7993d6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7496,7 +7496,14 @@ void md_do_sync(struct mddev *mddev)
 		 * about not overloading the IO subsystem. (things like an
 		 * e2fsck being done on the RAID array should execute fast)
 		 */
-		cond_resched();
+		if (cond_resched())
+			if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
+					mddev->curr_resync_completed != j &&
+					atomic_read(&mddev->recovery_active) == 0) {
+				mddev->curr_resync_completed = j;
+				set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+				sysfs_notify(&mddev->kobj, NULL, "sync_completed");
+			}
 
 		currspeed = ((unsigned long)(io_sectors-mddev->resync_mark_cnt))/2
 			/((jiffies-mddev->resync_mark)/HZ +1) +1;
@@ -7505,6 +7512,13 @@ void md_do_sync(struct mddev *mddev)
 			if ((currspeed > speed_max(mddev)) ||
 					!is_mddev_idle(mddev, 0)) {
 				msleep(500);
+				if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
+					mddev->curr_resync_completed != j &&
+					atomic_read(&mddev->recovery_active) == 0) {
+					mddev->curr_resync_completed = j;
+					set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+					sysfs_notify(&mddev->kobj, NULL, "sync_completed");
+				}
 				goto repeat;
 			}
 		}
-- 
1.7.9.5