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Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_D
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT) |
Date: |
Wed, 21 May 2008 01:54:52 +0100 |
User-agent: |
KMail/1.9.9 |
> > Seems like the easiest solution would be to have qcow always align its
> > writes. We don't do on the fly compression, so it should be fairly easy
> > to make this happen with minimal overhead.
>
> I did the patch you describe and post it to the mailing list on Tue, 22
> Jan 2008 11:17:09 +0100, it was called
> "[PATCH] snapshot=on and cache=off compatibility"
> but was never commented.
That patch that patch messes with O_DIRECT on an open file descriptor, which
was generally agreed to be a bad idea.
Paul
- [Qemu-devel] [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Laurent Vivier, 2008/05/20
- [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Anthony Liguori, 2008/05/20
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Anthony Liguori, 2008/05/20
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Jamie Lokier, 2008/05/20
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Anthony Liguori, 2008/05/20
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Kevin Wolf, 2008/05/21
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Paul Brook, 2008/05/20
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Anthony Liguori, 2008/05/20
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Kevin Wolf, 2008/05/21
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Jamie Lokier, 2008/05/21
- Re: [Qemu-devel] Re: [PATCH][v2] Align file accesses with cache=off (O_DIRECT), Avi Kivity, 2008/05/21