Re: [Qemu-devel] [PATCH v2 2/6] block/dirty-bitmap: add lock to bdrv_enable/disable_dirty_bitmap

[John Snow <jsnow@redhat.com>]

On 01/16/2018 07:54 AM, Vladimir Sementsov-Ogievskiy wrote:
> Add locks and remove comments about BQL accordingly to
> dirty_bitmap_mutex definition in block_int.h.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>  block/dirty-bitmap.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
> index 3777be1985..d0a10c4f5d 100644
> --- a/block/dirty-bitmap.c
> +++ b/block/dirty-bitmap.c
> @@ -389,18 +389,20 @@ void bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs,
>      }
>  }
>  
> -/* Called with BQL taken.  */
>  void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
>  {
> +    bdrv_dirty_bitmap_lock(bitmap);
>      assert(!bdrv_dirty_bitmap_frozen(bitmap));
>      bitmap->disabled = true;
> +    bdrv_dirty_bitmap_unlock(bitmap);
>  }
>  
> -/* Called with BQL taken.  */
>  void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
>  {
> +    bdrv_dirty_bitmap_lock(bitmap);
>      assert(!bdrv_dirty_bitmap_frozen(bitmap));
>      bitmap->disabled = false;
> +    bdrv_dirty_bitmap_unlock(bitmap);
>  }
>  
>  BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
> 

Reviewed-by: John Snow <jsnow@redhat.com>