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Commit 3fa841d7 authored by NeilBrown's avatar NeilBrown
Browse files

md: report device as congested when suspended 



This should writeback from coming when the device is temporarily
suspended.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent 0da3c619

drivers/md/linear.c

+3 −0
Original line number Diff line number Diff line
@@ -108,6 +108,9 @@ static int linear_congested(void *data, int bits) 
	linear_conf_t *conf;

	int i, ret = 0;



	if (mddev_congested(mddev, bits))

		return 1;



	rcu_read_lock();

	conf = rcu_dereference(mddev->private);

drivers/md/md.c

+6 −0
Original line number Diff line number Diff line
@@ -262,6 +262,12 @@ static void mddev_resume(mddev_t *mddev) 
	mddev->pers->quiesce(mddev, 0);

}



int mddev_congested(mddev_t *mddev, int bits)

{

	return mddev->suspended;

}

EXPORT_SYMBOL(mddev_congested);





static inline mddev_t *mddev_get(mddev_t *mddev)

{

drivers/md/md.h

+1 −0
Original line number Diff line number Diff line
@@ -430,6 +430,7 @@ extern void md_write_end(mddev_t *mddev); 
extern void md_done_sync(mddev_t *mddev, int blocks, int ok);

extern void md_error(mddev_t *mddev, mdk_rdev_t *rdev);



extern int mddev_congested(mddev_t *mddev, int bits);

extern void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,

			   sector_t sector, int size, struct page *page);

extern void md_super_wait(mddev_t *mddev);

drivers/md/multipath.c

+3 −0
Original line number Diff line number Diff line
@@ -199,6 +199,9 @@ static int multipath_congested(void *data, int bits) 
	multipath_conf_t *conf = mddev->private;

	int i, ret = 0;



	if (mddev_congested(mddev, bits))

		return 1;



	rcu_read_lock();

	for (i = 0; i < mddev->raid_disks ; i++) {

		mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);

drivers/md/raid0.c

+3 −0
Original line number Diff line number Diff line
@@ -44,6 +44,9 @@ static int raid0_congested(void *data, int bits) 
	mdk_rdev_t **devlist = conf->devlist;

	int i, ret = 0;



	if (mddev_congested(mddev, bits))

		return 1;



	for (i = 0; i < mddev->raid_disks && !ret ; i++) {

		struct request_queue *q = bdev_get_queue(devlist[i]->bdev);