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Re: [Qemu-block] [RFC PATCH v2 3/7] qcow2: Implement copy offloading
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-block] [RFC PATCH v2 3/7] qcow2: Implement copy offloading |
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Date: |
Thu, 26 Apr 2018 16:34:16 +0100 |
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User-agent: |
Mutt/1.9.2 (2017-12-15) |
On Wed, Apr 18, 2018 at 11:04:20AM +0800, Fam Zheng wrote:
> +static int qcow2_co_copy_range_to(BlockDriverState *bs,
> + BdrvChild *src, uint64_t src_offset,
> + BdrvChild *dst, uint64_t dst_offset,
> + uint64_t bytes, BdrvRequestFlags flags)
> +{
In theory this could increment the refcount if src == dst. It's not
necessary to go down to leaf nodes if the sharing can be handled at the
qcow2 L2 table level.
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- [Qemu-block] [RFC PATCH v2 0/7] qemu-img convert with copy offloading, Fam Zheng, 2018/04/17
- [Qemu-block] [RFC PATCH v2 1/7] block: Introduce API for copy offloading, Fam Zheng, 2018/04/17
- [Qemu-block] [RFC PATCH v2 2/7] raw: Implement copy offloading, Fam Zheng, 2018/04/17
- [Qemu-block] [RFC PATCH v2 3/7] qcow2: Implement copy offloading, Fam Zheng, 2018/04/17
- Re: [Qemu-block] [RFC PATCH v2 3/7] qcow2: Implement copy offloading,
Stefan Hajnoczi <=
- [Qemu-block] [RFC PATCH v2 4/7] file-posix: Implement bdrv_co_copy_range, Fam Zheng, 2018/04/17
- [Qemu-block] [RFC PATCH v2 5/7] iscsi: Implement copy offloading, Fam Zheng, 2018/04/17
- [Qemu-block] [RFC PATCH v2 6/7] block-backend: Add blk_co_copy_range, Fam Zheng, 2018/04/17
- [Qemu-block] [RFC PATCH v2 7/7] qemu-img: Convert with copy offloading, Fam Zheng, 2018/04/17