Re: [PATCH 1/9] move blk_iopoll to limit and make it generally available

From	Or Gerlitz <gerlitz.or@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/9] move blk_iopoll to limit and make it generally available
Date	2015-11-15 10:10 +0100
Message-ID	<qv1tU-7Qe-5@gated-at.bofh.it> (permalink)
References	<qun3s-77o-17@gated-at.bofh.it> <qun3v-77o-61@gated-at.bofh.it> <quosy-88l-3@gated-at.bofh.it> <quD8e-Wt-11@gated-at.bofh.it> <qv1ay-7t7-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Sun, Nov 15, 2015 at 10:48 AM, Sagi Grimberg
<sagig@dev.mellanox.co.il> wrote:
> Or is correct,
>
> I have attempted to convert iser to use blk_iopoll in the past, however
> I've seen inconsistent performance and latency skews (comparing to
> tasklets iser is using today). This was manifested in IOPs test cases
> where I ran multiple threads with higher queue-depth and not in
> sanitized pure latency (QD=1) test cases. Unfortunately I didn't have
> the time to pick it up since.
>
> I do have every intention of testing it again with this. If it still
> exist we will need to find the root-cause of it before converting
> drivers to use it.

Good, this way (inconsistent performance and latency skews) or another
(all shines up) -- please
let us know your findings, best through commenting within V > 0 the
cover letter posts of this series
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Thread

add a proper completion queue abstraction Christoph Hellwig <hch@lst.de> - 2015-11-13 15:00 +0100
  [PATCH 7/9] IB/iser: Use a dedicated descriptor for login Christoph Hellwig <hch@lst.de> - 2015-11-13 15:00 +0100
  [PATCH 1/9] move blk_iopoll to limit and make it generally available Christoph Hellwig <hch@lst.de> - 2015-11-13 15:00 +0100
    Re: [PATCH 1/9] move blk_iopoll to limit and make it generally available Or Gerlitz <gerlitz.or@gmail.com> - 2015-11-13 16:30 +0100
      Re: [PATCH 1/9] move blk_iopoll to limit and make it generally  available Christoph Hellwig <hch@lst.de> - 2015-11-14 08:10 +0100
        Re: [PATCH 1/9] move blk_iopoll to limit and make it generally  available Sagi Grimberg <sagig@dev.mellanox.co.il> - 2015-11-15 09:50 +0100
          Re: [PATCH 1/9] move blk_iopoll to limit and make it generally available Or Gerlitz <gerlitz.or@gmail.com> - 2015-11-15 10:10 +0100
            Re: [PATCH 1/9] move blk_iopoll to limit and make it generally  available Sagi Grimberg <sagig@dev.mellanox.co.il> - 2015-11-15 14:20 +0100
          Re: [PATCH 1/9] move blk_iopoll to limit and make it generally  available Christoph Hellwig <hch@lst.de> - 2015-11-15 14:00 +0100
    Re: [PATCH 1/9] move blk_iopoll to limit and make it generally  available Christoph Hellwig <hch@lst.de> - 2015-11-14 08:10 +0100
      Re: [PATCH 1/9] move blk_iopoll to limit and make it generally  available Christoph Hellwig <hch@lst.de> - 2015-11-18 15:00 +0100
  [PATCH 6/9] srp: use the new CQ API Christoph Hellwig <hch@lst.de> - 2015-11-13 15:00 +0100
    Re: [PATCH 6/9] srp: use the new CQ API Christoph Hellwig <hch@lst.de> - 2015-11-18 15:10 +0100
  [PATCH 4/9] srpt: chain RDMA READ/WRITE requests Christoph Hellwig <hch@lst.de> - 2015-11-13 15:00 +0100
    Re: [PATCH 4/9] srpt: chain RDMA READ/WRITE requests Sagi Grimberg <sagig@dev.mellanox.co.il> - 2015-11-18 10:20 +0100
      Re: [PATCH 4/9] srpt: chain RDMA READ/WRITE requests Christoph Hellwig <hch@lst.de> - 2015-11-20 11:30 +0100
    Re: [PATCH 4/9] srpt: chain RDMA READ/WRITE requests Christoph Hellwig <hch@lst.de> - 2015-11-18 15:10 +0100
  [PATCH 9/9] IB/iser: Convert to CQ abstraction Christoph Hellwig <hch@lst.de> - 2015-11-13 15:00 +0100
  [PATCH 8/9] IB/iser: Use helper for container_of Christoph Hellwig <hch@lst.de> - 2015-11-13 15:00 +0100

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