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Re: [PATCH 0/2] Introduce the request handling for dm-crypt

From Mark Brown <broonie@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH 0/2] Introduce the request handling for dm-crypt
Date 2015-11-12 16:10 +0100
Message-ID <qu1FD-240-5@gated-at.bofh.it> (permalink)
References <qtA2K-Xz-15@gated-at.bofh.it> <qtZaO-nZ-17@gated-at.bofh.it> <qtZDP-z5-3@gated-at.bofh.it> <qtZDP-z5-1@gated-at.bofh.it>
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On Thu, Nov 12, 2015 at 01:57:27PM +0100, Arnd Bergmann wrote:
> On Thursday 12 November 2015 20:51:10 Baolin Wang wrote:

> > But it maybe not enough for HW engine which can handle maybe 10M/20M
> > at one time.

> Given that you have already done measurements, can you find out how much
> you lose in overall performance with your existing patch if you artificially
> limit the maximum size to sizes like 256kb, 1MB, 4MB, ...?

It's probably also worth looking at the impact on CPU utilisation as
well as throughput in your benchmarking since the system will often not
be idle when it's doing a lot of I/O - I know you've done some
measurements in that area before, including them when looking at block
sizes might be interesting.

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Thread

[PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-11 10:40 +0100
  [PATCH 1/2] block: Introduce BIO_ENDIO_FREE for bio flags Baolin Wang <baolin.wang@linaro.org> - 2015-11-11 10:40 +0100
    Re: [PATCH 1/2] block: Introduce BIO_ENDIO_FREE for bio flags Mike Snitzer <snitzer@redhat.com> - 2015-11-11 19:00 +0100
      Re: [PATCH 1/2] block: Introduce BIO_ENDIO_FREE for bio flags Baolin Wang <baolin.wang@linaro.org> - 2015-11-12 05:10 +0100
  Re: [PATCH 0/2] Introduce the request handling for dm-crypt Christoph Hellwig <hch@infradead.org> - 2015-11-11 10:50 +0100
    Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-12 03:20 +0100
      Re: [PATCH 0/2] Introduce the request handling for dm-crypt Jan Kara <jack@suse.cz> - 2015-11-12 10:20 +0100
        Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-12 10:50 +0100
          Re: [PATCH 0/2] Introduce the request handling for dm-crypt Jan Kara <jack@suse.cz> - 2015-11-12 12:10 +0100
            Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-12 12:50 +0100
              Re: [PATCH 0/2] Introduce the request handling for dm-crypt Jan Kara <jack@suse.cz> - 2015-11-12 13:30 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Arnd Bergmann <arnd@arndb.de> - 2015-11-12 14:00 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Mark Brown <broonie@kernel.org> - 2015-11-12 16:10 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-13 04:30 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-13 04:30 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-12 14:00 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Jan Kara <jack@suse.cz> - 2015-11-12 14:00 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-13 03:10 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Arnd Bergmann <arnd@arndb.de> - 2015-11-13 10:10 +0100
                Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-13 12:40 +0100
  Re: [PATCH 0/2] Introduce the request handling for dm-crypt Mike Snitzer <snitzer@redhat.com> - 2015-11-11 19:20 +0100
    Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-12 03:40 +0100
      Re: [dm-devel] [PATCH 0/2] Introduce the request handling for  dm-crypt Christoph Hellwig <hch@infradead.org> - 2015-11-12 10:10 +0100
    Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-12 09:30 +0100
      Re: [PATCH 0/2] Introduce the request handling for dm-crypt Mark Brown <broonie@kernel.org> - 2015-11-12 11:10 +0100
        Re: [PATCH 0/2] Introduce the request handling for dm-crypt Jens Axboe <axboe@kernel.dk> - 2015-11-12 16:30 +0100
          Re: [PATCH 0/2] Introduce the request handling for dm-crypt Baolin Wang <baolin.wang@linaro.org> - 2015-11-13 03:10 +0100
          Re: [PATCH 0/2] Introduce the request handling for dm-crypt Mark Brown <broonie@kernel.org> - 2015-11-13 13:00 +0100
    Re: [dm-devel] [PATCH 0/2] Introduce the request handling for  dm-crypt Christoph Hellwig <hch@infradead.org> - 2015-11-12 10:10 +0100

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