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Re: [Qemu-devel] [PATCH 0/4] block: Vectored bdrv_writev_vmstate
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH 0/4] block: Vectored bdrv_writev_vmstate |
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Date: |
Tue, 9 Apr 2013 10:30:45 +0200 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Tue, Apr 09, 2013 at 10:08:22AM +0200, Paolo Bonzini wrote:
> Il 09/04/2013 10:04, Kevin Wolf ha scritto:
> >> >
> >> > Looks good, but given there are patches to fix it, I'm not sure it's
> >> > worth the trouble...
> > Shouldn't this perform even a little better? And we should get rid of
> > non-vectored interfaces in the block layer anyway.
>
> Yes, if you have a very fast disk it should. Network throughput with
> Orit's patches jumped from 2.9 Gbps to 4.2 Gbps. But savevm is not
> live, so it is not as important to make it really fast.
Users have been asking about poor savevm/loadvm performance recently. I
think anything we can do it improve it, especially since these patches
already exist, is good.
Stefan
- [Qemu-devel] [PATCH 0/4] block: Vectored bdrv_writev_vmstate, Kevin Wolf, 2013/04/05
- [Qemu-devel] [PATCH 1/4] block: Introduce bdrv_writev_vmstate, Kevin Wolf, 2013/04/05
- [Qemu-devel] [PATCH 2/4] savevm: Implement block_writev_buffer(), Kevin Wolf, 2013/04/05
- [Qemu-devel] [PATCH 3/4] block: Introduce bdrv_pwritev() for qcow2_save_vmstate, Kevin Wolf, 2013/04/05
- [Qemu-devel] [PATCH 4/4] qemu-iotests: A few more bdrv_pread/pwrite tests, Kevin Wolf, 2013/04/05
- Re: [Qemu-devel] [PATCH 0/4] block: Vectored bdrv_writev_vmstate, Stefan Hajnoczi, 2013/04/08
Re: [Qemu-devel] [PATCH 0/4] block: Vectored bdrv_writev_vmstate, Stefan Hajnoczi, 2013/04/09