From: Christoph Hellwig <hch@lst.de>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] qcow2: Drop synchronous qcow_write()
Date: Mon, 18 May 2009 13:59:04 +0200 [thread overview]
Message-ID: <20090518115904.GA11112@lst.de> (raw)
In-Reply-To: <4A0AAA36.9040707@redhat.com>
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.
prev parent reply other threads:[~2009-05-18 11:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-13 10:46 [Qemu-devel] [PATCH] qcow2: Drop synchronous qcow_write() Kevin Wolf
2009-05-13 10:59 ` Christoph Hellwig
2009-05-13 11:08 ` Kevin Wolf
2009-05-18 11:59 ` Christoph Hellwig [this message]
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