Re: [Qemu-devel] [PATCH for 2.5 1/1] parallels: dirty BAT properly for continuous allocations

["Denis V. Lunev" <den@openvz.org>]

On 11/17/2015 08:02 PM, Denis V. Lunev wrote:
> From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
>
> This patch marks part of the BAT dirty properly. There is a possibility that
> multy-block allocation could have one block allocated on one BAT page and
> next block on the next page. The code without the patch could not save
> updated position to the file.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> Signed-off-by: Denis V. Lunev <den@openvz.org>
> CC: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>   block/parallels.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/block/parallels.c b/block/parallels.c
> index 4f79293..f689fde 100644
> --- a/block/parallels.c
> +++ b/block/parallels.c
> @@ -220,7 +220,7 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
>           s->bat_bitmap[idx + i] = cpu_to_le32(s->data_end / s->off_multiplier);
>           s->data_end += s->tracks;
>           bitmap_set(s->bat_dirty_bmap,
> -                   bat_entry_off(idx) / s->bat_dirty_block, 1);
> +                   bat_entry_off(idx + i) / s->bat_dirty_block, 1);
>       }
>   
>       return bat2sect(s, idx) + sector_num % s->tracks;
Stefan,

how should we proceed with this? Should I send this as
a pull request or you could take this yourself?

Den