Re: [PATCH v3] mm: page_reporting: allow driver to set batch capacity

[Michael S. Tsirkin]

On Sun, Jul 05, 2026 at 01:51:16AM -0700, Andrew Morton wrote:
> On Sun, 5 Jul 2026 04:42:38 -0400 "Michael S. Tsirkin" <mst@xxxxxxxxxx> 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@xxxxxxxxxx> 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.

Out of curiousity, is this specific to -mm?

-- 
MST