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md: report device as congested when suspended

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

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2009-09-23 18:10:29 +10:00
parent 0da3c6194e
commit 3fa841d7e7
8 changed files with 24 additions and 0 deletions
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3
drivers/md/linear.c
View file

@ -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);

6
drivers/md/md.c
View file

@ -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)
{

1
drivers/md/md.h
View file

@ -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);

3
drivers/md/multipath.c
View file

@ -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);

3
drivers/md/raid0.c
View file

@ -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);

3
drivers/md/raid1.c
View file

@ -576,6 +576,9 @@ static int raid1_congested(void *data, int bits)
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->mirrors[i].rdev);

2
drivers/md/raid10.c
View file

@ -631,6 +631,8 @@ static int raid10_congested(void *data, int bits)
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 && ret == 0; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);

3
drivers/md/raid5.c
View file

@ -3332,6 +3332,9 @@ static int raid5_congested(void *data, int bits)
/* No difference between reads and writes. Just check
* how busy the stripe_cache is
*/
if (mddev_congested(mddev, bits))
return 1;
if (conf->inactive_blocked)
return 1;
if (conf->quiesce)