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authorNeilBrown <neilb@suse.de>2009-09-23 18:10:29 +1000
committerNeilBrown <neilb@suse.de>2009-09-23 18:10:29 +1000
commit3fa841d7e7266f6fcc1b3885b905f5153ba897d8 (patch)
tree7afa971a10eddcf52787340ea43fa1e910b5805b /drivers/md
parent0da3c6194ec2f32617b272df4505a1cf022faea5 (diff)
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md: report device as congested when suspended
This should writeback from coming when the device is temporarily suspended. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/linear.c3
-rw-r--r--drivers/md/md.c6
-rw-r--r--drivers/md/md.h1
-rw-r--r--drivers/md/multipath.c3
-rw-r--r--drivers/md/raid0.c3
-rw-r--r--drivers/md/raid1.c3
-rw-r--r--drivers/md/raid10.c2
-rw-r--r--drivers/md/raid5.c3
8 files changed, 24 insertions, 0 deletions
diff --git a/drivers/md/linear.c b/drivers/md/linear.c
index ea484290544..1ceceb334d5 100644
--- a/drivers/md/linear.c
+++ b/drivers/md/linear.c
@@ -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);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index a3dd3c8ea68..26ba42a7912 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -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)
{
diff --git a/drivers/md/md.h b/drivers/md/md.h
index f55d2ff9513..f184b69ef33 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -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);
diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 94c21c11b9b..dcbf9d35928 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -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);
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 68a4d129206..d3a4ce06015 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -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);
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 7efdeb44097..a1eb4e13a11 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -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);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 7872968fdfc..191f42efecc 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -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);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index bee3573ed1b..9db84c98a41 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -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)