linux-kernel - Re: [PATCH BUGFIX IMPROVEMENT V2 0/1] block, bfq: eliminate latency regression with fast drives

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Message-ID: <6867cf11-d7f8-cadf-b9ec-85549bb86af3@kernel.dk>
Date:   Tue, 16 Jul 2019 08:11:49 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Paolo Valente <paolo.valente@...aro.org>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        ulf.hansson@...aro.org, linus.walleij@...aro.org,
        bfq-iosched@...glegroups.com, oleksandr@...alenko.name
Subject: Re: [PATCH BUGFIX IMPROVEMENT V2 0/1] block, bfq: eliminate latency
 regression with fast drives

On 7/15/19 4:57 AM, Paolo Valente wrote:
> [V2 that should apply cleanly on current HEAD]
> 
> Hi Jens,
> I've spotted a regression on a fast SSD: a loss of I/O-latency control
> with interactive tasks (such as the application start up I usually
> test). Details in the commit.
> 
> I do hope that, after proper review, this commit makes it for 5.3.

If it's a regression, it should have a Fixes: line telling us which
commit originally introduced the regression. This is important for
folks doing backports. Can you add that?

-- 
Jens Axboe