linux-kernel - Re: [PATCH v7 12/12] Documentation: mm: update the admin guide for mTHP collapse

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Message-ID: <CAA1CXcAqAQ=WazLc=s3bQEbjLah27-fPTGgofZ55h7+rtFacJQ@mail.gmail.com>
Date: Sun, 8 Jun 2025 23:56:25 -0600
From: Nico Pache <npache@...hat.com>
To: Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc: Dev Jain <dev.jain@....com>, linux-mm@...ck.org, linux-doc@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	david@...hat.com, ziy@...dia.com, lorenzo.stoakes@...cle.com, 
	Liam.Howlett@...cle.com, ryan.roberts@....com, corbet@....net, 
	rostedt@...dmis.org, mhiramat@...nel.org, mathieu.desnoyers@...icios.com, 
	akpm@...ux-foundation.org, baohua@...nel.org, willy@...radead.org, 
	peterx@...hat.com, wangkefeng.wang@...wei.com, usamaarif642@...il.com, 
	sunnanyong@...wei.com, vishal.moola@...il.com, 
	thomas.hellstrom@...ux.intel.com, yang@...amperecomputing.com, 
	kirill.shutemov@...ux.intel.com, aarcange@...hat.com, raquini@...hat.com, 
	anshuman.khandual@....com, catalin.marinas@....com, tiwai@...e.de, 
	will@...nel.org, dave.hansen@...ux.intel.com, jack@...e.cz, cl@...two.org, 
	jglisse@...gle.com, surenb@...gle.com, zokeefe@...gle.com, hannes@...xchg.org, 
	rientjes@...gle.com, mhocko@...e.com, rdunlap@...radead.org, 
	Bagas Sanjaya <bagasdotme@...il.com>
Subject: Re: [PATCH v7 12/12] Documentation: mm: update the admin guide for
 mTHP collapse

On Sun, Jun 8, 2025 at 9:06 PM Baolin Wang
<baolin.wang@...ux.alibaba.com> wrote:
>
>
>
> On 2025/6/9 03:50, Nico Pache wrote:
> > On Sat, Jun 7, 2025 at 8:35 AM Dev Jain <dev.jain@....com> wrote:
> >>
> >>
> >> On 07/06/25 6:27 pm, Nico Pache wrote:
> >>> On Sat, Jun 7, 2025 at 12:45 AM Dev Jain <dev.jain@....com> wrote:
> >>>>
> >>>> On 15/05/25 8:52 am, Nico Pache wrote:
> >>>>
> >>>> Now that we can collapse to mTHPs lets update the admin guide to
> >>>> reflect these changes and provide proper guidence on how to utilize it.
> >>>>
> >>>> Reviewed-by: Bagas Sanjaya <bagasdotme@...il.com>
> >>>> Signed-off-by: Nico Pache <npache@...hat.com>
> >>>> ---
> >>>>    Documentation/admin-guide/mm/transhuge.rst | 14 +++++++++++++-
> >>>>    1 file changed, 13 insertions(+), 1 deletion(-)
> >>>>
> >>>> diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst
> >>>> index dff8d5985f0f..5c63fe51b3ad 100644
> >>>> --- a/Documentation/admin-guide/mm/transhuge.rst
> >>>> +++ b/Documentation/admin-guide/mm/transhuge.rst
> >>>>
> >>>>
> >>>> We need to modify/remove the following paragraph:
> >>>>
> >>>> khugepaged currently only searches for opportunities to collapse to
> >>>> PMD-sized THP and no attempt is made to collapse to other THP
> >>>> sizes.
> >>> On this version this is currently still true, but once I add Baolin's
> >>> patch it will not be true. Thanks for the reminder :)
> >>
> >> You referenced Baolin's patch in the other email too, can you send the link,
> >> or the patch?
> >
> > He didn't send it to the mailing list, but rather off chain to all the
> > recipients of this series. You should have it in your email look for
> >
> > Subject: "mm: khugepaged: allow khugepaged to check all anonymous mTHP
> > orders" and "mm: khugepaged: kick khugepaged for enabling
> > none-PMD-sized mTHPs"
>
> You can find them at the following link:
> https://lore.kernel.org/all/ac9ed6d71b439611f9c94b3506a8ce975d4636e9.1748435162.git.baolin.wang@linux.alibaba.com/
Ah whoops you did send them on-chain. I'm so used to seeing the
mailing lists as the first recipients on the CC list xD
>