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Re: [Qemu-devel] [PATCH 06/13] qcow2: Convert to bdrv_co_pwrite_zeroes()

From: Kevin Wolf
Subject: Re: [Qemu-devel] [PATCH 06/13] qcow2: Convert to bdrv_co_pwrite_zeroes()
Date: Wed, 25 May 2016 15:53:51 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

Am 25.05.2016 um 00:25 hat Eric Blake geschrieben:
> Another step on our continuing quest to switch to byte-based
> interfaces.
> There are still opportunities to optimize the qcow2 handling
> of zero clusters.  For example, if the backing file only has
> non-zero data in the portion about to be overwritten, then
> we could widen the request and make the entire cluster zero,
> rather than falling back to -ENOTSUP.  But for this patch,
> intentionally leave the semantics unchanged, even if not
> optimal.
> Signed-off-by: Eric Blake <address@hidden>

Reviewed-by: Kevin Wolf <address@hidden>

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