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Re: [Qemu-devel] [PATCH v3 1/5] blkdebug: Sanity check block layer guara
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From: |
Max Reitz |
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Subject: |
Re: [Qemu-devel] [PATCH v3 1/5] blkdebug: Sanity check block layer guarantees |
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Date: |
Tue, 6 Dec 2016 22:26:21 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.0 |
On 02.12.2016 20:22, Eric Blake wrote:
> Commits 04ed95f4 and 1a62d0ac updated the block layer to auto-fragment
> any I/O to fit within device boundaries. Additionally, when using a
> minimum alignment of 4k, we want to ensure the block layer does proper
> read-modify-write rather than requesting I/O on a slice of a sector.
> Let's enforce that the contract is obeyed when using blkdebug. For
> now, blkdebug only allows alignment overrides, and just inherits other
> limits from whatever device it is wrapping, but a future patch will
> further enhance things.
>
> Signed-off-by: Eric Blake <address@hidden>
>
> ---
> v3: rebase to byte-based interfaces
> v2: new patch
> ---
> block/blkdebug.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
Reviewed-by: Max Reitz <address@hidden>
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