Re: [RFC V5 10/16] blk-wbt: get rid of wbt_enable/disable_default()

[RFC V5 0/16] blk: blk-rq-qos framework refactor and cleanup · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 01/16] blk: make the whole blk_mq_submit_bio under q_usage_counter · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
Re: [RFC V5 01/16] blk: make the whole blk_mq_submit_bio under q_usage_counter · Christoph Hellwig <hch@infradead.org> · 2022-02-24
Re: [RFC V5 01/16] blk: make the whole blk_mq_submit_bio under q_usage_counter · Wang Jianchao <hidden> · 2022-02-25
[RFC V5 02/16] blk/rq-qos: prepare to make blk-rq-qos pluggable · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
Re: [RFC V5 02/16] blk/rq-qos: prepare to make blk-rq-qos pluggable · Christoph Hellwig <hch@infradead.org> · 2022-02-24
Re: [RFC V5 02/16] blk/rq-qos: prepare to make blk-rq-qos pluggable · Tejun Heo <tj@kernel.org> · 2022-02-24
[RFC V5 03/16] blk-wbt: make wbt pluggable · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 04/16] blk-iolatency: make iolatency pluggable · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 05/16] blk-iocost: make iocost pluggable · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 06/16] blk-ioprio: make ioprio pluggable · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 07/16] blk/rq-qos: get rid of unused interfaces of rqos · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 08/16] blk/rq-qos: export the sysfs for switching qos · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 09/16] blk-wbt: show wbt_lat_us sysfs interface only when wbt is opened · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 10/16] blk-wbt: get rid of wbt_enable/disable_default() · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
Re: [RFC V5 10/16] blk-wbt: get rid of wbt_enable/disable_default() · Christoph Hellwig <hch@infradead.org> · 2022-02-24
Re: [RFC V5 10/16] blk-wbt: get rid of wbt_enable/disable_default() · Tejun Heo <tj@kernel.org> · 2022-02-24
[RFC V5 11/16] blk/rq-qos: get rid of debugfs register in blk_mq_debugfs_register · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 13/16] blk-wbt: move cache setting to rq_qos_setting_changed() · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 12/16] blk/rq-qos: change queue_depth_changed to setting_changed · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 14/16] blk-wbt: cleanup the blk-wbt.h · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 15/16] blk/rq-qos: move the rqos debugfs code to blk-rq-qos.c · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
[RFC V5 16/16] blk/rq-qos: add config to control the whole blk-rq-qos framework · Wang Jianchao (Kuaishou) <hidden> · 2022-02-24
Re: [RFC V5 0/16] blk: blk-rq-qos framework refactor and cleanup · Christoph Hellwig <hch@infradead.org> · 2022-02-24

From: Christoph Hellwig <hch@infradead.org>
Date: 2022-02-24 13:46:44
Also in: lkml

On Thu, Feb 24, 2022 at 05:06:48PM +0800, Wang Jianchao (Kuaishou) wrote:

wbt_enable_default() is used to open wbt feature by default.
wbt_disable_default() is only employed by bfq which has similar
writeback throttling mechanism. This kind of policy should be
selected by the user instead of being set in kernel. This patch
get rid of the interfaces and let the user configure appropricate
blk-rq-qos policy by themselves.

This drastically changes the user visible behavior.

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