linux-kernel - Re: [PATCH] mm: add per-order mTHP swpin counters

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Message-ID: <87jzdq9n6h.fsf@yhuang6-desk2.ccr.corp.intel.com>
Date: Wed, 30 Oct 2024 13:25:58 +0800
From: "Huang, Ying" <ying.huang@...el.com>
To: Barry Song <21cnbao@...il.com>
Cc: akpm@...ux-foundation.org,  linux-mm@...ck.org,
  linux-kernel@...r.kernel.org,  Barry Song <v-songbaohua@...o.com>,  David
 Hildenbrand <david@...hat.com>,  Baolin Wang
 <baolin.wang@...ux.alibaba.com>,  Chris Li <chrisl@...nel.org>,  Yosry
 Ahmed <yosryahmed@...gle.com>,  Kairui Song <kasong@...cent.com>,  Ryan
 Roberts <ryan.roberts@....com>,  Kanchana P Sridhar
 <kanchana.p.sridhar@...el.com>,  Usama Arif <usamaarif642@...il.com>
Subject: Re: [PATCH] mm: add per-order mTHP swpin counters

Barry Song <21cnbao@...il.com> writes:

> On Wed, Oct 30, 2024 at 4:45 PM Huang, Ying <ying.huang@...el.com> wrote:
>>
>> Barry Song <21cnbao@...il.com> writes:
>>
>> > From: Barry Song <v-songbaohua@...o.com>
>> >
>> > This helps profile the sizes of folios being swapped in. Currently,
>> > only mTHP swap-out is being counted.
>>
>> Better to describe the user space interface in patch description?
>>
>
> Do you mean something as below?
>
> The new interface can be found at:
>
> /sys/kernel/mm/transparent_hugepage/hugepages-<size>/stats
>          swapin

Yes.  Some example output may be even better.

--
Best Regards,
Huang, Ying