From: Jens Axboe <axboe@kernel.dk>
To: Song Liu <songliubraving@fb.com>,
linux-block@vger.kernel.org, linux-raid@vger.kernel.org
Cc: marcin.wanat@gmail.com
Subject: Re: [PATCH] blk-mq: allow 4x BLK_MAX_REQUEST_COUNT at blk_plug for multiple_queues
Date: Tue, 7 Sep 2021 17:05:33 -0600 [thread overview]
Message-ID: <f64a938a-372c-aac1-4c5c-4b9456af5a69@kernel.dk> (raw)
In-Reply-To: <20210907230338.227903-1-songliubraving@fb.com>
On 9/7/21 5:03 PM, Song Liu wrote:
> Limiting number of request to BLK_MAX_REQUEST_COUNT at blk_plug hurts
> performance for large md arrays. [1] shows resync speed of md array drops
> for md array with more than 16 HDDs.
>
> Fix this by allowing more request at plug queue. The multiple_queue flag
> is used to only apply higher limit to multiple queue cases.
Applied, thanks.
--
Jens Axboe
next prev parent reply other threads:[~2021-09-07 23:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-07 23:03 [PATCH] blk-mq: allow 4x BLK_MAX_REQUEST_COUNT at blk_plug for multiple_queues Song Liu
2021-09-07 23:05 ` Jens Axboe [this message]
2021-09-10 14:43 ` [Non-DoD Source] " Finlayson, James M CIV (USA)
2021-09-10 14:48 ` Jens Axboe
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