mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-16 17:57:38 -04:00
Code Issues Packages Projects Releases Wiki Activity

block, bfq: don't grab queue_lock to initialize bfq

Browse Source 
The request_queue is frozen and quiesced while the elevator init_sched()
method runs, so queue_lock is not needed for BFQ cgroup initialization.

Signed-off-by: Yu Kuai <yukuai@fygo.io>
Link: https://patch.msgid.link/1965073ea20f33114a8d903816b986e483b9bb34.1780621988.git.yukuai@fygo.io
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Yu Kuai
2026-06-08 11:42:49 +08:00
committed by Jens Axboe
parent f928145cbc
commit 3ca4f4e3ae
1 changed files with 0 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
block/bfq-iosched.c
View File

@@ -7204,10 +7204,7 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_queue *eq)
return -ENOMEM;
eq->elevator_data = bfqd;
spin_lock_irq(&q->queue_lock);
q->elevator = eq;
spin_unlock_irq(&q->queue_lock);
/*
* Our fallback bfqq if bfq_find_alloc_queue() runs into OOM issues.
@@ -7240,7 +7237,6 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_queue *eq)
* If the disk supports multiple actuators, copy independent
* access ranges from the request queue structure.
*/
spin_lock_irq(&q->queue_lock);
if (ia_ranges) {
/*
* Check if the disk ia_ranges size exceeds the current bfq
@@ -7266,7 +7262,6 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_queue *eq)
bfqd->sector[0] = 0;
bfqd->nr_sectors[0] = get_capacity(q->disk);
}
spin_unlock_irq(&q->queue_lock);
INIT_LIST_HEAD(&bfqd->dispatch);