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Date: Fri, 12 Dec 2008 21:12:49 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] [RFC] Replace posix-aio with custom thread pool
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To: Andrea Arcangeli <aarcange@redhat.com>
Cc: qemu-devel@nongnu.org, kvm-devel <kvm@vger.kernel.org>

Andrea Arcangeli wrote:
> On Fri, Dec 12, 2008 at 12:17:58PM -0600, Anthony Liguori wrote:
>> You assume that anything using bdrv_aio_readv/writev will be going through 
>> a DMA API.  This isn't a safe assumption.
> 
> Well it's obviously a safe assumption right now... ;)

Well, the xen block backend in my xen patch queue calls bdrv_* directly
right now.  Dunno whenever it is possible/useful to fit the grant table
stuff into the upcoming dma api somehow.

cheers,
  Gerd