diff options
Diffstat (limited to 'drivers/md/dm-snap.c')
| -rw-r--r-- | drivers/md/dm-snap.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 6a0df6349e68..7e77c16d7728 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -245,12 +245,14 @@ struct dm_snap_tracked_chunk { static void init_tracked_chunk(struct bio *bio) { struct dm_snap_tracked_chunk *c = dm_per_bio_data(bio, sizeof(struct dm_snap_tracked_chunk)); + INIT_HLIST_NODE(&c->node); } static bool is_bio_tracked(struct bio *bio) { struct dm_snap_tracked_chunk *c = dm_per_bio_data(bio, sizeof(struct dm_snap_tracked_chunk)); + return !hlist_unhashed(&c->node); } @@ -399,6 +401,7 @@ static struct origin *__lookup_origin(struct block_device *origin) static void __insert_origin(struct origin *o) { struct list_head *sl = &_origins[origin_hash(o->bdev)]; + list_add_tail(&o->hash_list, sl); } @@ -418,6 +421,7 @@ static struct dm_origin *__lookup_dm_origin(struct block_device *origin) static void __insert_dm_origin(struct dm_origin *o) { struct list_head *sl = &_dm_origins[origin_hash(o->dev->bdev)]; + list_add_tail(&o->hash_list, sl); } @@ -868,6 +872,7 @@ static int calc_max_buckets(void) { /* use a fixed size of 2MB */ unsigned long mem = 2 * 1024 * 1024; + mem /= sizeof(struct hlist_bl_head); return mem; @@ -1552,6 +1557,7 @@ static bool wait_for_in_progress(struct dm_snapshot *s, bool unlock_origins) * throttling is unlikely to negatively impact performance. */ DECLARE_WAITQUEUE(wait, current); + __add_wait_queue(&s->in_progress_wait, &wait); __set_current_state(TASK_UNINTERRUPTIBLE); spin_unlock(&s->in_progress_wait.lock); @@ -2567,6 +2573,7 @@ again: if (o) { if (limit) { struct dm_snapshot *s; + list_for_each_entry(s, &o->snapshots, list) if (unlikely(!wait_for_in_progress(s, true))) goto again; |