Re: [PATCH v2] mm/balloon_compaction: avoid duplicate page removal

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Jul 18, 2019 at 01:36:26PM -0700, Andrew Morton wrote:
> On Thu, 18 Jul 2019 08:26:11 -0400 "Michael S. Tsirkin" <mst@redhat.com> wrote:
> 
> > On Thu, Jul 18, 2019 at 05:27:20PM +0800, Wei Wang wrote:
> > > Fixes: 418a3ab1e778 (mm/balloon_compaction: List interfaces)
> > > 
> > > A #GP is reported in the guest when requesting balloon inflation via
> > > virtio-balloon. The reason is that the virtio-balloon driver has
> > > removed the page from its internal page list (via balloon_page_pop),
> > > but balloon_page_enqueue_one also calls "list_del"  to do the removal.
> > > This is necessary when it's used from balloon_page_enqueue_list, but
> > > not from balloon_page_enqueue_one.
> > > 
> > > So remove the list_del balloon_page_enqueue_one, and update some
> > > comments as a reminder.
> > > 
> > > Signed-off-by: Wei Wang <wei.w.wang@intel.com>
> > 
> > 
> > ok I posted v3 with typo fixes. 1/2 is this patch with comment changes. Pls take a look.
> 
> I really have no idea what you're talking about here :(.  Some other
> discussion and patch thread, I suppose.
> 
> You're OK with this patch?

Not exactly. I will send v5 soon, you will be CC'd.

> Should this patch have cc:stable?

Yes. Sorry.