Groups > linux.kernel > #1203879

Re: [PATCH v9 6/6] block: loop: support DIO & AIO

From	Christoph Hellwig <hch@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v9 6/6] block: loop: support DIO & AIO
Date	2015-08-10 10:10 +0200
Message-ID	<pVQjF-9c-35@gated-at.bofh.it> (permalink)
References	(5 earlier) <pVywp-6Xi-5@gated-at.bofh.it> <pVz97-7GV-3@gated-at.bofh.it> <pVzLP-dy-3@gated-at.bofh.it> <pVIvM-4ph-17@gated-at.bofh.it> <pVLtD-wQ-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Sun, Aug 09, 2015 at 10:50:41PM -0400, Ming Lei wrote:
> Christoph, could you share your idea again about this approch?
> 
> If you still don't think it is good to switch between buffered I/O
> and direct I/O, I will not do that in next post.

If we epxose a 512 byte block size to the loop device people will use
it, for example mkfs.xfs might do smaller I/O, extN will default to
small blocksize for small devices, etc.

If you are using a loop devices on a 4k sector backing device and care
about performance (which current loop users generally don't..) just
make sure to set the loop block size to 4k, which Hannes' series will
allow us to do easily.
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Thread

[PATCH v9 0/6] block: loop: improve loop with AIO Ming Lei <ming.lei@canonical.com> - 2015-08-06 10:50 +0200
  [PATCH v9 6/6] block: loop: support DIO & AIO Ming Lei <ming.lei@canonical.com> - 2015-08-06 10:50 +0200
    Re: [PATCH v9 6/6] block: loop: support DIO & AIO Christoph Hellwig <hch@infradead.org> - 2015-08-07 09:50 +0200
      Re: [PATCH v9 6/6] block: loop: support DIO & AIO Ming Lei <ming.lei@canonical.com> - 2015-08-07 10:30 +0200
        Re: [PATCH v9 6/6] block: loop: support DIO & AIO Christoph Hellwig <hch@infradead.org> - 2015-08-09 08:50 +0200
          Re: [PATCH v9 6/6] block: loop: support DIO & AIO Ming Lei <ming.lei@canonical.com> - 2015-08-09 15:10 +0200
            Re: [PATCH v9 6/6] block: loop: support DIO & AIO Christoph Hellwig <hch@infradead.org> - 2015-08-09 15:50 +0200
              Re: [PATCH v9 6/6] block: loop: support DIO & AIO Ming Lei <ming.lei@canonical.com> - 2015-08-09 16:30 +0200
                Re: [PATCH v9 6/6] block: loop: support DIO & AIO Dave Chinner <david@fromorbit.com> - 2015-08-10 01:50 +0200
                Re: [PATCH v9 6/6] block: loop: support DIO & AIO Ming Lei <ming.lei@canonical.com> - 2015-08-10 05:00 +0200
                Re: [PATCH v9 6/6] block: loop: support DIO & AIO Christoph Hellwig <hch@infradead.org> - 2015-08-10 10:10 +0200
                Re: [PATCH v9 6/6] block: loop: support DIO & AIO Ming Lei <ming.lei@canonical.com> - 2015-08-10 16:40 +0200

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