Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook

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Subject: Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
From: Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>
Date: Wed, 14 Feb 2018 10:55:41 +0100
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Hi.

14.02.2018 09:56, Paolo Valente wrote:

This has evidently to do with tag pressure.  I've looked for a way to
easily reduce the number of tags online, so as to put your system in
the bad spot deterministically.  But at no avail.  Does anyone know a
way to do it?

Isn't this a case for block device queue_depth? IIRC, the amount of tagsis derived from it.


Oleksandr

Follow-Ups:
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith

References:
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Oleksandr Natalenko
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Paolo Valente
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Paolo Valente
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Mike Galbraith
- Re: [PATCH BUGFIX V3] block, bfq: add requeue-request hook
  - From: Paolo Valente

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