On Fri, Jun 12, 2015 at 03:02:33PM -0400, John Snow wrote: > > > On 06/10/2015 10:30 AM, Stefan Hajnoczi wrote: > > On Mon, Jun 08, 2015 at 06:21:20PM +0300, Vladimir Sementsov-Ogievskiy > > wrote: > > > > I noticed a corner case, it's probably not a problem in practice: > > > > Since the dirty bitmap is stored with the help of a BlockDriverState > > (and its bs->file), it's possible that writing the bitmap will cause > > bits in the bitmap to be dirtied! > > > > But since it's metadata and not stored within a disk sector, can this > actually happen? Do you have an example of a scenario where this might > come up?
The persistent dirty bitmap for bs->file is storeed in the qcow2 BDS. This results in recursion. This is a misconfiguration but I just want to understand what happens when someone does this by mistake. Stefan
pgphr6nGzVmyB.pgp
Description: PGP signature
