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authorJens Axboe <axboe@fb.com>2014-05-30 08:25:36 -0600
committerJens Axboe <axboe@fb.com>2014-05-30 08:25:36 -0600
commit67aec14ce87fe25bdfff7dbf468556333df11c4e (patch)
tree85857d82abc91996bfdf054774f46e5aa519acec /block/blk-mq.c
parent2230237500821aedfcf2bba2a79d9cbca389233c (diff)
blk-mq: make the sysfs mq/ layout reflect current mappings
Currently blk-mq registers all the hardware queues in sysfs, regardless of whether it uses them (e.g. they have CPU mappings) or not. The unused hardware queues lack the cpux/ directories, and the other sysfs entries (like active, pending, etc) are all zeroes. Change this so that sysfs correctly reflects the current mappings of the hardware queues. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 21f952ab3581..71f564e8812e 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1924,6 +1924,8 @@ static void blk_mq_queue_reinit(struct request_queue *q)
{
blk_mq_freeze_queue(q);
+ blk_mq_sysfs_unregister(q);
+
blk_mq_update_queue_map(q->mq_map, q->nr_hw_queues);
/*
@@ -1934,6 +1936,8 @@ static void blk_mq_queue_reinit(struct request_queue *q)
blk_mq_map_swqueue(q);
+ blk_mq_sysfs_register(q);
+
blk_mq_unfreeze_queue(q);
}