Re: [PATCH v3] migration: clear the memory region dirty bitmap when skipping free pages

[Peter Xu <peterx@redhat.com>]

On Thu, Jul 22, 2021 at 09:57:13AM +0000, Wang, Wei W wrote:
> On Thursday, July 22, 2021 5:48 PM, David Hildenbrand wrote:
> > On 22.07.21 10:30, Wei Wang wrote:
> > > When skipping free pages to send, their corresponding dirty bits in
> > > the memory region dirty bitmap need to be cleared. Otherwise the
> > > skipped pages will be sent in the next round after the migration
> > > thread syncs dirty bits from the memory region dirty bitmap.
> > >
> > > Cc: David Hildenbrand <david@redhat.com>
> > > Cc: Peter Xu <peterx@redhat.com>
> > > Cc: Michael S. Tsirkin <mst@redhat.com>
> > > Reported-by: David Hildenbrand <david@redhat.com>
> > > Signed-off-by: Wei Wang <wei.w.wang@intel.com>
> > > ---
> > >   migration/ram.c | 74
> > +++++++++++++++++++++++++++++++++++++------------
> > >   1 file changed, 56 insertions(+), 18 deletions(-)
> > >
> > 
> > LGTM, thanks
> > 
> > Reviewed-by: David Hildenbrand <david@redhat.com>
> > 
> 
> Thanks. Please remember to have a regression test together with Peterx's that patch when you get a chance.

I can continue to try that; but it's slightly low priority to me so it could be
a bit delayed.  If either of you could help that would be great, as I still
don't know last time why I didn't use free-page-hint right (note: I definitely
checked lsmod for sure; so it's there).  So I'll need to figure that out first.

Thanks,

-- 
Peter Xu