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From: Zhang Yi <yi.zhang@huawei.com>
To: <linux-block@vger.kernel.org>
Cc: <axboe@kernel.dk>, <jbacik@fb.com>, <yi.zhang@huawei.com>,
	<yukuai3@huawei.com>
Subject: [PATCH 0/2] blk-wbt: fix two wbt enable problems
Date: Sat, 19 Jun 2021 17:36:58 +0800	[thread overview]
Message-ID: <20210619093700.920393-1-yi.zhang@huawei.com> (raw)

Commit a79050434b45 ("blk-rq-qos: refactor out common elements of
blk-wbt") introduce two wbt enable problems. The first one will cause
false positive check by rwb_enabled() and lead to IO hung, the second
one is wbt_enable_default() could not re-enable wbt after switch
elevator back from bfq to other one.

Zhang Yi (2):
  blk-wbt: introduce a new disable state to prevent false positive by
    rwb_enabled()
  blk-wbt: make sure throttle is enabled properly

 block/blk-wbt.c | 11 ++++++++---
 block/blk-wbt.h |  1 +
 2 files changed, 9 insertions(+), 3 deletions(-)

-- 
2.31.1


             reply	other threads:[~2021-06-19  9:28 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-19  9:36 Zhang Yi [this message]
2021-06-19  9:36 ` [PATCH 1/2] blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled() Zhang Yi
2021-06-19  9:37 ` [PATCH 2/2] blk-wbt: make sure throttle is enabled properly Zhang Yi
2021-06-21 16:07 ` [PATCH 0/2] blk-wbt: fix two wbt enable problems Jens Axboe

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