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[Qemu-devel] Re: [PATCH 0/2 version 2] fw_cfg: Implement fast "DMA"-type


From: Richard W.M. Jones
Subject: [Qemu-devel] Re: [PATCH 0/2 version 2] fw_cfg: Implement fast "DMA"-type operation for rapidly copying in kernel, initrd [etc] into the guest
Date: Mon, 19 Jul 2010 11:49:09 +0100
User-agent: Mutt/1.5.18 (2008-05-17)

On Mon, Jul 19, 2010 at 01:45:00PM +0300, Gleb Natapov wrote:
> On Mon, Jul 19, 2010 at 11:15:04AM +0100, Richard W.M. Jones wrote:
> > 
> > This is the second version of the patch.
> > 
> > We don't use the word "blit" any more, instead this is replaced with
> > "DMA", even though it's not quite like a DMA operation on physical
> > hardware.
> > 
> You ignored the whole discussion above. Calling things DMA will not make
> them so. You haven't event implemented Alexander's suggestion to poll
> for DMA completion which will at lease make the interface to the guest
> palatable.

I read everything in the discussion.

I can add polling however.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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