diff options
| author |   NeilBrown <neilb@suse.de> | 2015-02-26 12:21:04 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2015-04-22 08:00:43 +1000 |
| commit | 5423399a84ee1d92d29d763029ed40e4905cf50f (patch) | |
| tree | d245c89749eaf7d2c14b361e2885485a5be69e4f /drivers/md | |
| parent | md/raid5: move max_nr_stripes management into grow_one_stripe and drop_one_stripe (diff) | |
| download | linux-dev-5423399a84ee1d92d29d763029ed40e4905cf50f.tar.xz linux-dev-5423399a84ee1d92d29d763029ed40e4905cf50f.zip | |
md/raid5: change ->inactive_blocked to a bit-flag.
This allows us to easily add more (atomic) flags.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid5.c | 13 | ||||
| -rw-r--r-- | drivers/md/raid5.h | 9 |
2 files changed, 14 insertions, 8 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 78ac7dc853c7..b7cd32e7f29e 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -672,20 +672,23 @@ get_active_stripe(struct r5conf *conf, sector_t sector, *(conf->hash_locks + hash)); sh = __find_stripe(conf, sector, conf->generation - previous); if (!sh) { - if (!conf->inactive_blocked) + if (!test_bit(R5_INACTIVE_BLOCKED, &conf->cache_state)) sh = get_free_stripe(conf, hash); if (noblock && sh == NULL) break; if (!sh) { - conf->inactive_blocked = 1; + set_bit(R5_INACTIVE_BLOCKED, + &conf->cache_state); wait_event_lock_irq( conf->wait_for_stripe, !list_empty(conf->inactive_list + hash) && (atomic_read(&conf->active_stripes) < (conf->max_nr_stripes * 3 / 4) - || !conf->inactive_blocked), + || !test_bit(R5_INACTIVE_BLOCKED, + &conf->cache_state)), *(conf->hash_locks + hash)); - conf->inactive_blocked = 0; + clear_bit(R5_INACTIVE_BLOCKED, + &conf->cache_state); } else { init_stripe(sh, sector, previous); atomic_inc(&sh->count); @@ -4602,7 +4605,7 @@ static int raid5_congested(struct mddev *mddev, int bits) * how busy the stripe_cache is */ - if (conf->inactive_blocked) + if (test_bit(R5_INACTIVE_BLOCKED, &conf->cache_state)) return 1; if (conf->quiesce) return 1; diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 6614ac5ffc0e..ebe4e24bc14d 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -509,9 +509,11 @@ struct r5conf { struct llist_head released_stripes; wait_queue_head_t wait_for_stripe; wait_queue_head_t wait_for_overlap; - int inactive_blocked; /* release of inactive stripes blocked, - * waiting for 25% to be free - */ + unsigned long cache_state; +#define R5_INACTIVE_BLOCKED 1 /* release of inactive stripes blocked, + * waiting for 25% to be free + */ + int pool_size; /* number of disks in stripeheads in pool */ spinlock_t device_lock; struct disk_info *disks; @@ -526,6 +528,7 @@ struct r5conf { int worker_cnt_per_group; }; + /* * Our supported algorithms */ |