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Commit e1dfa0a2 authored by NeilBrown's avatar NeilBrown
Browse files

md: use new plugging interface for RAID IO. 



md/raid submits a lot of IO from the various raid threads.
So adding start/finish plug calls to those so that some
plugging happens.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 99e22598

drivers/md/raid1.c

+4 −1
Original line number Diff line number Diff line
@@ -1516,9 +1516,11 @@ static void raid1d(mddev_t *mddev) 
	conf_t *conf = mddev->private;

	struct list_head *head = &conf->retry_list;

	mdk_rdev_t *rdev;

	struct blk_plug plug;



	md_check_recovery(mddev);



	blk_start_plug(&plug);

	for (;;) {

		char b[BDEVNAME_SIZE];
@@ -1593,6 +1595,7 @@ static void raid1d(mddev_t *mddev) 
		}

		cond_resched();

	}

	blk_finish_plug(&plug);

}

drivers/md/raid10.c

+3 −0
Original line number Diff line number Diff line
@@ -1640,9 +1640,11 @@ static void raid10d(mddev_t *mddev) 
	conf_t *conf = mddev->private;

	struct list_head *head = &conf->retry_list;

	mdk_rdev_t *rdev;

	struct blk_plug plug;



	md_check_recovery(mddev);



	blk_start_plug(&plug);

	for (;;) {

		char b[BDEVNAME_SIZE];
@@ -1716,6 +1718,7 @@ static void raid10d(mddev_t *mddev) 
		}

		cond_resched();

	}

	blk_finish_plug(&plug);

}

drivers/md/raid5.c

+3 −0
Original line number Diff line number Diff line
@@ -4478,11 +4478,13 @@ static void raid5d(mddev_t *mddev) 
	struct stripe_head *sh;

	raid5_conf_t *conf = mddev->private;

	int handled;

	struct blk_plug plug;



	pr_debug("+++ raid5d active\n");



	md_check_recovery(mddev);



	blk_start_plug(&plug);

	handled = 0;

	spin_lock_irq(&conf->device_lock);

	while (1) {
@@ -4525,6 +4527,7 @@ static void raid5d(mddev_t *mddev) 
	spin_unlock_irq(&conf->device_lock);



	async_tx_issue_pending_all();

	blk_finish_plug(&plug);



	pr_debug("--- raid5d inactive\n");

}