Re: [PATCH BUGFIX 1/1] block, bfq: add requeue-request hook

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To: Mike Galbraith <efault@xxxxxx>
Subject: Re: [PATCH BUGFIX 1/1] block, bfq: add requeue-request hook
From: Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>
Date: Tue, 06 Feb 2018 09:37:52 +0100
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Cc: Paolo Valente <paolo.valente@xxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, ulf.hansson@xxxxxxxxxx, broonie@xxxxxxxxxx, linus.walleij@xxxxxxxxxx, bfq-iosched@xxxxxxxxxxxxxxxx, alban.browaeys@xxxxxxxxx, ming.lei@xxxxxxxxxx, ivan@xxxxxxxxxx, 169364@xxxxxxxxxxxxxxxxxxx, Serena Ziviani <ziviani.serena@xxxxxxxxx>
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Hi.

06.02.2018 08:56, Mike Galbraith wrote:

I was doing kbuilds, and it blew up on me twice.  Switching back to cfq
seemed to confirm it was indeed the patch causing trouble, but that's
by no means a certainty.

Just to note, I was using v4.15.1, not the latest git HEAD. Are you ableto reproduce it on the stable kernel? Also, assuming this issue might beunrelated to the BFQ itself, did you manage to reproduce the troublewith another blk-mq scheduler (not CFQ, but mq-deadline/Kyber)?


Regards,
  Oleksandr

Follow-Ups:
- Re: [PATCH BUGFIX 1/1] block, bfq: add requeue-request hook
  - From: Mike Galbraith

References:
- [PATCH BUGFIX 0/1] block, bfq: handle requeues of I/O requests
  - From: Paolo Valente
- [PATCH BUGFIX 1/1] block, bfq: add requeue-request hook
  - From: Paolo Valente
- Re: [PATCH BUGFIX 1/1] block, bfq: add requeue-request hook
  - From: Oleksandr Natalenko
- Re: [PATCH BUGFIX 1/1] block, bfq: add requeue-request hook
  - From: Mike Galbraith

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