Re: [PATCH v2] mm: fix the inaccurate memory statistics issue for users

[Andrew Morton]

On Fri, 4 Jul 2025 14:22:11 -0400 Luiz Capitulino <luizcap@xxxxxxxxxx> wrote:

> > The patch is simple enough.  I'll add fixes:f1a7941243c1 and cc:stable
> > and, as the problem has been there for years, I'll leave the patch in
> > mm-unstable so it will eventually get into LTS, in a well tested state.
> 
> Andrew, are you considering submitting this patch for 6.16? I think
> we should, it does look like a regression for larger systems built
> with 64k base page size.

I wasn't planning on 6.16-rcX because it's been there for years but
sure, I moved it into the mm-hotfixes pile so it'll go Linuswards next
week.

> On comparing a very simple app which just allocates & touches some
> memory against v6.1 (which doesn't have f1a7941243c1) and latest
> Linus tree (4c06e63b9203) I can see that on latest Linus tree the
> values for VmRSS, RssAnon and RssFile from /proc/self/status are
> all zeroes while they do report values on v6.1 and a Linus tree
> with this patch.

Cool, I'll paste this para into the changelog to help people link this
patch with wrong behavior which they are observing.