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authorKevin Wolf <kwolf@redhat.com>2016-06-03 17:36:27 +0200
committerKevin Wolf <kwolf@redhat.com>2016-06-16 15:19:55 +0200
commit9d52aa3c38484703c05e791bac1ff588588a217c (patch)
treef3936cee7f30b44a358085479958b3b1d525293e /spice-qemu-char.c
parent2174f12bdeb3974141784e14bbb7ad8c53178cd9 (diff)
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 allocation. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'spice-qemu-char.c')
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