linux-kernel - Re: [PATCH 1/4] mm: page_ext: add an iteration API for page extensions

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Message-ID: <dc78326f-38ac-4207-be59-2b753e0dc26b@redhat.com>
Date: Thu, 20 Feb 2025 21:47:38 +0100
From: David Hildenbrand <david@...hat.com>
To: Luiz Capitulino <luizcap@...hat.com>, linux-kernel@...r.kernel.org,
 linux-mm@...ck.org, yuzhao@...gle.com, pasha.tatashin@...een.com
Cc: akpm@...ux-foundation.org, hannes@...xchg.org, muchun.song@...ux.dev
Subject: Re: [PATCH 1/4] mm: page_ext: add an iteration API for page
 extensions


>> I personally don't like over-using inline functions, also I don't think this
>> code needs optimization since the current clients make the affected code paths
>> slow anyways (and this also applies to the likely/unlikely use in page_owner
>> and page_table_check, I'd drop all of them if you ask me). But again, I can
>> change if this would prevent you from giving your ACK :)
> 
> Well, 512^512 function calls for a 1 GiB page just to traverse the page
> ext? :)

Ehm, 512^2 :)


-- 
Cheers,

David / dhildenb