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Re: [Qemu-devel] [PATCH 5/6] raw-posix: Implement .bdrv_co_preadv/pwrite
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH 5/6] raw-posix: Implement .bdrv_co_preadv/pwritev |
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Date: |
Tue, 14 Jun 2016 13:09:45 +0100 |
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User-agent: |
Mutt/1.6.1 (2016-04-27) |
On Wed, Jun 08, 2016 at 04:10:10PM +0200, Kevin Wolf wrote:
> The raw-posix block driver actually supports byte-aligned requests now
> on non-O_DIRECT images, like it already (and previously incorrectly)
> claimed in bs->request_alignment.
>
> For some block drivers this means that a RMW cycle can be avoided when
> they write sub-sector metadata e.g. for cluster allocation.
>
> Signed-off-by: Kevin Wolf <address@hidden>
> ---
> block/linux-aio.c | 6 ++----
> block/raw-aio.h | 2 +-
> block/raw-posix.c | 42 ++++++++++++++++++++++--------------------
> 3 files changed, 25 insertions(+), 25 deletions(-)
Reviewed-by: Stefan Hajnoczi <address@hidden>
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- Re: [Qemu-devel] [PATCH 2/6] block: Prepare bdrv_aligned_preadv() for byte-aligned requests, (continued)
- [Qemu-devel] [PATCH 1/6] block: Byte-based bdrv_co_do_copy_on_readv(), Kevin Wolf, 2016/06/08
- [Qemu-devel] [PATCH 3/6] block: Prepare bdrv_aligned_pwritev() for byte-aligned requests, Kevin Wolf, 2016/06/08
- [Qemu-devel] [PATCH 5/6] raw-posix: Implement .bdrv_co_preadv/pwritev, Kevin Wolf, 2016/06/08
- [Qemu-devel] [PATCH 4/6] raw-posix: Switch to bdrv_co_* interfaces, Kevin Wolf, 2016/06/08
- [Qemu-devel] [PATCH 6/6] block: Don't enforce 512 byte minimum alignment, Kevin Wolf, 2016/06/08
- Re: [Qemu-devel] [PATCH 0/6] block: Enable byte granularity I/O, Stefan Hajnoczi, 2016/06/13