Re: [Qemu-devel] [PATCH 3/9] block: Add BDRV_REQ_WRITE_UNCHANGED flag

[Stefan Hajnoczi]

On Mon, Apr 16, 2018 at 06:58:43PM +0200, Max Reitz wrote:
> This flag signifies that a write request will not change the visible
> disk content.  With this flag set, it is sufficient to have the
> BLK_PERM_WRITE_UNCHANGED permission instead of BLK_PERM_WRITE.
> 
> Signed-off-by: Max Reitz <address@hidden>
> ---
>  include/block/block.h | 6 +++++-
>  block/io.c            | 6 +++++-
>  2 files changed, 10 insertions(+), 2 deletions(-)

Reviewed-by: Stefan Hajnoczi <address@hidden>

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