Re: [Qemu-devel] [PATCH 1/2] dirty-bitmap: Report BlockDirtyInfo.count in bytes, as documented

[John Snow <jsnow@redhat.com>]

On 07/21/2017 02:32 PM, Eric Blake wrote:
> We've been documenting the value in bytes since its introduction
> in commit b9a9b3a4 (v1.3), where it was actually reported in bytes.
> 
> Commit e4654d2 (v2.0) then removed things from block/qapi.c, in
> preparation for a rewrite to a list of dirty sectors in the next
> commit 21b5683 in block.c, but the new code mistakenly started
> reporting in sectors.
> 
> Fixes: https://bugzilla.redhat.com/1441460
> 
> CC: qemu-stable@nongnu.org
> Signed-off-by: Eric Blake <eblake@redhat.com>
> Reviewed-by: John Snow <jsnow@redhat.com>
> 

I must have forgotten about this -- Didn't this get reviewed as part of 
your byte series? Is this a resend for a stable branch?

> ---
> Too late for 2.9, since the regression has been unnoticed for
> nine releases. But worth putting in 2.9.1 and 2.10.
> 
> v2-v4: no change
> ---
>   block/dirty-bitmap.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
> index 543bddb9b5..30462d4f9a 100644
> --- a/block/dirty-bitmap.c
> +++ b/block/dirty-bitmap.c
> @@ -461,7 +461,7 @@ BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
>       QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) {
>           BlockDirtyInfo *info = g_new0(BlockDirtyInfo, 1);
>           BlockDirtyInfoList *entry = g_new0(BlockDirtyInfoList, 1);
> -        info->count = bdrv_get_dirty_count(bm);
> +        info->count = bdrv_get_dirty_count(bm) << BDRV_SECTOR_BITS;
>           info->granularity = bdrv_dirty_bitmap_granularity(bm);
>           info->has_name = !!bm->name;
>           info->name = g_strdup(bm->name);
> 

-- 
—js