linux-kernel - Re: [PATCH v10 00/13] khugepaged: mTHP support

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Message-ID: <CAA1CXcDpRywoWKXyoJPBgs0TCbENooQsj+hDzYVhP4eYsiiFJw@mail.gmail.com>
Date: Wed, 20 Aug 2025 09:55:56 -0600
From: Nico Pache <npache@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>
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Subject: Re: [PATCH v10 00/13] khugepaged: mTHP support

On Tue, Aug 19, 2025 at 3:55 PM Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> On Tue, 19 Aug 2025 07:41:52 -0600 Nico Pache <npache@...hat.com> wrote:
>
> > The following series provides khugepaged with the capability to collapse
> > anonymous memory regions to mTHPs.
> >
> > ...
> >
> > - I created a test script that I used to push khugepaged to its limits
> >    while monitoring a number of stats and tracepoints. The code is
> >    available here[1] (Run in legacy mode for these changes and set mthp
> >    sizes to inherit)
>
> Could this be turned into something in tools/testing/selftests/mm/?
Yep! I was actually working on some selftests for this before I hit a
weird bug during some of my testing, which took precedence over that.

I was planning on sending a separate series for the testing. One of
the pain points was that selftests helpers were set up for PMDs, but I
think Baolin just cleaned that up in his khugepaged mTHP shmem series
(still need to review). So it should be a lot easier to implement now.
>
> > V10 Changes:
>
> I'll add this to mm-new, thanks.  I'll suppress the usual emails.
Thank you :)
-- Nico
>