Re: [PATCH RFC v2 0/5] block: add block-dirty-bitmap-populate job

[Peter Krempa]

On Wed, May 13, 2020 at 23:49:17 -0400, John Snow wrote:
> Hi,
> 
> This is a new (very small) block job that writes a pattern into a
> bitmap. The only pattern implemented is the top allocation information.
> 
> This can be used to "recover" an incremental bitmap chain if an external
> snapshot was taken without creating a new bitmap first: any writes made
> to the image will be reflected by the allocation status and can be
> written back into a bitmap.
> 
> This is useful for e.g. libvirt managing backup chains if a user creates
> an external snapshot outside of libvirt.

I've dusted-off my patches for using this blockjob for this very
specific case and it works for me.

Tested-by: Peter Krempa <address@hidden>

For now I'll continue the integration with other blockjobs where we
merge bitmaps.