[PATCH] Avoid long delay for scsi scanning when thousands of LUNs
From: Jason Luo
Date: Mon Oct 19 2015 - 02:51:51 EST
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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