Re: [Qemu-devel] [PATCH] qcow2: Drop synchronous qcow_write()

[Christoph Hellwig]

On Wed, May 13, 2009 at 01:08:38PM +0200, Kevin Wolf wrote:
> Christoph Hellwig schrieb:
> > Looks good to me, that strary qcow2_write irked me, too.  Do you plan
> > to kill qcow_read, too?
> 
> Hm, haven't planned that because qcow_read() is used in a much more
> common code path, but in theory the very same approach should work there
> (and someone seems to have done this already for qcow1?).
> 
> Don't know how the emulation behaves performance wise though,
> qcow_read() is used for each cluster allocation. I guess the difference
> is negligible?

Good question.  Probably needs some benchmarking first.