[PATCH] Avoid long delay for scsi scanning when thousands of LUNs

[Jason Luo]

Signed-off-by: Jason Luo <zhangqing.luo@xxxxxxxxxx>
---
  block/blk-mq-sysfs.c | 4 +++-
  1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index b79685e..06533a9 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -404,7 +404,9 @@ static void blk_mq_sysfs_init(struct request_queue *q)
  /* see blk_register_queue() */
  void blk_mq_finish_init(struct request_queue *q)
  {
-	percpu_ref_switch_to_percpu(&q->mq_usage_counter);
+	/* Maybe some other things can be done here in the future
+	 * leave it with empty */
+	/*percpu_ref_switch_to_percpu(&q->mq_usage_counter);*/
  }

  int blk_mq_register_disk(struct gendisk *disk)
-- 2.1.4
--
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