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Re: [Qemu-block] [PATCH 06/13] qcow2: Convert to bdrv_co_pwrite_zeroes()
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From: |
Kevin Wolf |
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Subject: |
Re: [Qemu-block] [PATCH 06/13] qcow2: Convert to bdrv_co_pwrite_zeroes() |
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Date: |
Wed, 25 May 2016 15:53:51 +0200 |
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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>
- [Qemu-block] [PATCH 13/13] block: Kill bdrv_co_write_zeroes(), (continued)
- [Qemu-block] [PATCH 13/13] block: Kill bdrv_co_write_zeroes(), Eric Blake, 2016/05/24
- [Qemu-block] [PATCH 11/13] raw_bsd: Convert to bdrv_co_pwrite_zeroes(), Eric Blake, 2016/05/24
- [Qemu-block] [PATCH 02/13] block: Track write zero limits in bytes, Eric Blake, 2016/05/24
- [Qemu-block] [PATCH 05/13] iscsi: Convert to bdrv_co_pwrite_zeroes(), Eric Blake, 2016/05/24
- [Qemu-block] [PATCH 06/13] qcow2: Convert to bdrv_co_pwrite_zeroes(), Eric Blake, 2016/05/24
- Re: [Qemu-block] [PATCH 06/13] qcow2: Convert to bdrv_co_pwrite_zeroes(),
Kevin Wolf <=
- [Qemu-block] [PATCH 07/13] blkreplay: Convert to bdrv_co_pwrite_zeroes(), Eric Blake, 2016/05/24
- Re: [Qemu-block] [PATCH 00/13] Kill sector-based write_zeroes, Kevin Wolf, 2016/05/25