Re: [Qemu-block] [PATCH V2] block/io: optimize bdrv_co_pwritev for small requests

On Tue, 05/24 16:30, Peter Lieven wrote: > in a read-modify-write cycle a small request might cause > head and tail to fall into the same aligned block. Currently > QEMU reads the same block twice in this case which is > not necessary. > > Signed-off-by: Peter Lieven Thanks,

Re: [Qemu-block] [PATCH V2] block/io: optimize bdrv_co_pwritev for small requests

Am 24.05.2016 um 16:30 hat Peter Lieven geschrieben: > in a read-modify-write cycle a small request might cause > head and tail to fall into the same aligned block. Currently > QEMU reads the same block twice in this case which is > not necessary. > > Signed-off-by: Peter Lieven

[Qemu-block] [PATCH V2] block/io: optimize bdrv_co_pwritev for small requests

in a read-modify-write cycle a small request might cause head and tail to fall into the same aligned block. Currently QEMU reads the same block twice in this case which is not necessary. Signed-off-by: Peter Lieven --- v1->v2: following Paolos suggestions to simplify the if