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authorNeilBrown <neilb@suse.de>2015-02-26 12:21:04 +1100
committerNeilBrown <neilb@suse.de>2015-04-22 08:00:43 +1000
commit5423399a84ee1d92d29d763029ed40e4905cf50f (patch)
treed245c89749eaf7d2c14b361e2885485a5be69e4f /drivers/md
parent486f0644c3482cbf64fe804499836e1f05abec14 (diff)
downloadblackbird-op-linux-5423399a84ee1d92d29d763029ed40e4905cf50f.tar.gz
blackbird-op-linux-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.c13
-rw-r--r--drivers/md/raid5.h9
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
*/
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