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authorYu Kuai <yukuai3@huawei.com>2022-10-19 15:15:18 +0300
committerJens Axboe <axboe@kernel.dk>2022-10-24 03:59:17 +0300
commit671fae5e51297fc76b3758ca2edd514858734a6a (patch)
treea7f429a319b75d06d43e3d4d757e2f2f664fbceb /block/elevator.h
parent181d06637451b5348d746039478e71fa53dfbff6 (diff)
downloadlinux-671fae5e51297fc76b3758ca2edd514858734a6a.tar.xz
blk-wbt: don't enable throttling if default elevator is bfq
Commit b5dc5d4d1f4f ("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>
Diffstat (limited to 'block/elevator.h')
-rw-r--r--block/elevator.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/block/elevator.h b/block/elevator.h
index ed574bf3e629..75382471222d 100644
--- a/block/elevator.h
+++ b/block/elevator.h
@@ -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