[Qemu-block] [PATCH 5/6] raw-posix: Implement .bdrv_co_preadv/pwritev

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 alloc

Re: [Qemu-block] [PATCH 5/6] raw-posix: Implement .bdrv_co_preadv/pwritev

On 06/08/2016 08:10 AM, 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 >

Re: [Qemu-block] [PATCH 5/6] raw-posix: Implement .bdrv_co_preadv/pwritev

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