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Date: Sun, 5 Jul 2026 01:51:16 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: linux-kernel@vger.kernel.org, "David Hildenbrand (Arm)"
 <david@kernel.org>, Gregory Price <gourry@gourry.net>, Zi Yan
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 linux-mm@kvack.org
Subject: Re: [PATCH v3] mm: page_reporting: allow driver to set batch
 capacity
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On Sun, 5 Jul 2026 04:42:38 -0400 "Michael S. Tsirkin" <mst@redhat.com> wrote:

> On Sun, Jul 05, 2026 at 01:39:56AM -0700, Andrew Morton wrote:
> > On Sun, 5 Jul 2026 04:25:53 -0400 "Michael S. Tsirkin" <mst@redhat.com> wrote:
> > 
> > > > > If capacity is 0 or exceeds PAGE_REPORTING_CAPACITY, it defaults
> > > > > to PAGE_REPORTING_CAPACITY.  The 0 check and the clamping is done in
> > > > > page_reporting_register(), before the reporting work is scheduled,
> > > > > so we never get division by 0.
> > > > 
> > > > Thanks.  What's the priority here?  Should we fix 7.2?  Earlier?
> > > 
> > > If possible, I'd like it in 7.2, have a setup like this (small
> > > queue is useful for perf testing).
> > > It's very early in the cycle and the code seems straight forward...
> > > I judge the chances of breaking anything is tiny because
> > > it just failed probe previously.
> > 
> > No probs, I moved this to the the mm-hotfixes-unstable queue.  No cc:stable.
> 
> I suspect the Fixes tag will make their AI pick it anyway. But hey.

-stable maintainers have been asked not to do that - only backport
patches which have an explicit cc:stable.

So should I add one?