linux-kernel - Re: [PATCH BUGFIX 0/4] bfq: fix bugs breaking bandwidth guarantees occasionally

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Message-Id: <9BFD7497-CA97-413B-9387-0A192B5D1835@linaro.org>
Date:   Mon, 25 Jun 2018 21:51:01 +0200
From:   Paolo Valente <paolo.valente@...aro.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block <linux-block@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, ulf.hansson@...aro.org,
        broonie@...nel.org, linus.walleij@...aro.org,
        bfq-iosched@...glegroups.com, oleksandr@...alenko.name
Subject: Re: [PATCH BUGFIX 0/4] bfq: fix bugs breaking bandwidth guarantees
 occasionally

Sorry, one commit message broken, resending ...

> Il giorno 25 giu 2018, alle ore 21:48, Paolo Valente <paolo.valente@...aro.org> ha scritto:
> 
> Hi,
> during some bandwidth tests, I found some occasional but severe
> malfunctions (losses of bandwidth control). The first three patches in
> this series fix the bugs that caused these malfunctions. The last
> patch is a fix/improvement of the name of one of the functions
> involved with these bugs.
> 
> I guess these patches are appropriate for next kernel release.
> 
> Thanks,
> Paolo
> 
> Paolo Valente (4):
>  block, bfq: add/remove entity weights correctly
>  block, bfq: do not expire a queue that will deserve dispatch plugging
>  block, bfq: fix service being wrongly set to zero in case of
>    preemption
>  block, bfq: fix service being wrongly set to zero in case of
>    preemption
> 
> block/bfq-iosched.c | 131 +++++++++++++++++++++++++++++++++++++++++++---------
> block/bfq-iosched.h |   7 ++-
> block/bfq-wf2q.c    |  30 ++++++------
> 3 files changed, 128 insertions(+), 40 deletions(-)
> 
> --
> 2.16.1