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Re: [Qemu-devel] [5323] Implement an fd pool to get real AIO with posix-
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [5323] Implement an fd pool to get real AIO with posix-aio |
Date: |
Tue, 07 Oct 2008 22:40:18 +0200 |
User-agent: |
Thunderbird 2.0.0.16 (X11/20080723) |
Anthony Liguori wrote:
>> Are there plans to support vectored block requests with the thread pool
>> implementation?
>>
>
> Yes, that's the primary reason for doing a new thread pool
> implementation.
Cool.
> Of course, we need a zero-copy DMA API before such a
> thing would make sense.
Hmm, quick check of the IDE code indeed shows a copy happening there.
Why is it needed? My xen disk backend doesn't copy data. Does that
mean might have done something wrong? Does the virtio backend copy data
too?
Disclaimer: I don't know much about ide dma ...
cheers,
Gerd