aleph/lkl_linux
1
0
Fork 0
mirror of https://github.com/lkl/linux.git synced 2025-12-19 08:03:01 +09:00
Code Issues Packages Projects Releases Wiki Activity

blk-wbt: don't enable throttling if default elevator is bfq

Browse Source 
Commit b5dc5d4d1f ("block,bfq: Disable writeback throttling") tries to
disable wbt for bfq, it's done by calling wbt_disable_default() in
bfq_init_queue(). However, wbt is still enabled if default elevator is
bfq:

device_add_disk
 elevator_init_mq
  bfq_init_queue
   wbt_disable_default -> done nothing

 blk_register_queue
  wbt_enable_default -> wbt is enabled

Fix the problem by adding a new flag ELEVATOR_FLAG_DISBALE_WBT, bfq
will set the flag in bfq_init_queue, and following wbt_enable_default()
won't enable wbt while the flag is set.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20221019121518.3865235-7-yukuai1@huaweicloud.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Yu Kuai
2022-10-19 20:15:18 +08:00
committed by Jens Axboe
parent 181d066374
commit 671fae5e51
3 changed files with 12 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
block/elevator.h
View File

@@ -104,7 +104,8 @@ struct elevator_queue
DECLARE_HASHTABLE(hash, ELV_HASH_BITS);
};
#define ELEVATOR_FLAG_REGISTERED 0
#define ELEVATOR_FLAG_REGISTERED 0
#define ELEVATOR_FLAG_DISABLE_WBT 1
/*
* block elevator interface