Re: [PATCH v14 08/13] copy-on-read: skip non-guest reads if no copy needed

[Max Reitz]

On 04.12.20 23:07, Vladimir Sementsov-Ogievskiy wrote:
> From: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
>
> If the flag BDRV_REQ_PREFETCH was set, skip idling read/write
> operations in COR-driver. It can be taken into account for the
> COR-algorithms optimization. That check is being made during the
> block stream job by the moment.
>
> Add the BDRV_REQ_PREFETCH flag to the supported_read_flags of the
> COR-filter.
>
> block: Modify the comment for the flag BDRV_REQ_PREFETCH as we are
> going to use it alone and pass it to the COR-filter driver for further
> processing.
>
> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>   include/block/block.h |  8 +++++---
>   block/copy-on-read.c  | 14 ++++++++++----
>   2 files changed, 15 insertions(+), 7 deletions(-)

Reviewed-by: Max Reitz <mreitz@redhat.com>