linux-kernel - Re: [RESEND PATCH v7 00/10] Small-sized THP for anonymous memory

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <afb92816-25ed-41c8-a48b-94fb2d885d8e@redhat.com>
Date:   Tue, 28 Nov 2023 09:48:42 +0100
From:   David Hildenbrand <david@...hat.com>
To:     John Hubbard <jhubbard@...dia.com>,
        Ryan Roberts <ryan.roberts@....com>,
        Alistair Popple <apopple@...dia.com>
Cc:     Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Yin Fengwei <fengwei.yin@...el.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>, linux-mm@...ck.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH v7 00/10] Small-sized THP for anonymous memory


>>
>> Agreed. We are bikeshedding here. But if we really can't swallow "small-sized
>> THP" then perhaps the most efficient way to move this forwards is to review the
>> documentation (where "small-sized THP" appears twice in order to differentiate
>> from PMD-sized THP) - its in patch 3. Perhaps it will be easier to come up with
>> a good description in the context of those prose? Then once we have that,
>> hopefully a term will fall out that I'll update the commit logs with.
>>
> 
> I will see you over in patch 3, then. I've already looked at it and am going
> to suggest a long and a short name. The long name is for use in comments and
> documentation, and the short name is for variable fragments:
> 
>       Long name:  "pte-mapped THPs"
>       Short names: pte_thp, or pte-thp

The issue is that any THP can be pte-mapped, even a PMD-sized THP. 
However, the "natural" way to map a PMD-sized THP is using a PMD.

-- 
Cheers,

David / dhildenb