linux-kernel - Re: [PATCH v8 00/10] Multi-size THP for anonymous memory

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Message-ID: <d185a516-8d27-4e16-8c26-d9cd3f3de2a0@nvidia.com>
Date:   Tue, 5 Dec 2023 10:58:18 -0800
From:   John Hubbard <jhubbard@...dia.com>
To:     Ryan Roberts <ryan.roberts@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Yin Fengwei <fengwei.yin@...el.com>,
        David Hildenbrand <david@...hat.com>,
        Yu Zhao <yuzhao@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Yang Shi <shy828301@...il.com>,
        "Huang, Ying" <ying.huang@...el.com>, Zi Yan <ziy@...dia.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Itaru Kitayama <itaru.kitayama@...il.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        David Rientjes <rientjes@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Hugh Dickins <hughd@...gle.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        Barry Song <21cnbao@...il.com>,
        Alistair Popple <apopple@...dia.com>
Cc:     linux-mm@...ck.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 00/10] Multi-size THP for anonymous memory

On 12/5/23 3:13 AM, Ryan Roberts wrote:
> On 05/12/2023 03:37, John Hubbard wrote:
>> On 12/4/23 02:20, Ryan Roberts wrote:
...
>> With those two patchsets applied, the mm selftests look OK--or at least
>> as OK as they normally do. I compared test runs between THP/mTHP set to
>> "always", vs "never", to verify that there were no new test failures.
>> Details: specifically, I set one particular page size (2 MB) to
>> "inherit", and then toggled /sys/kernel/mm/transparent_hugepage/enabled
>> between "always" and "never".
> 
> Excellent - I'm guessing this was for 64K base pages?


Yes.


thanks,

-- 
John Hubbard
NVIDIA