linux-kernel - Re: [PATCH 0/5] add static huge zero folio support

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Message-ID: <8a39bcff-d0cf-4c1e-a076-f676a9ace4ba@redhat.com>
Date: Wed, 6 Aug 2025 13:28:56 +0200
From: David Hildenbrand <david@...hat.com>
To: "Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>,
 Dave Hansen <dave.hansen@...el.com>
Cc: Suren Baghdasaryan <surenb@...gle.com>,
 Ryan Roberts <ryan.roberts@....com>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>, Borislav Petkov <bp@...en8.de>,
 Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>,
 Vlastimil Babka <vbabka@...e.cz>, Zi Yan <ziy@...dia.com>,
 Mike Rapoport <rppt@...nel.org>, Dave Hansen <dave.hansen@...ux.intel.com>,
 Michal Hocko <mhocko@...e.com>, Lorenzo Stoakes
 <lorenzo.stoakes@...cle.com>, Andrew Morton <akpm@...ux-foundation.org>,
 Thomas Gleixner <tglx@...utronix.de>, Nico Pache <npache@...hat.com>,
 Dev Jain <dev.jain@....com>, "Liam R . Howlett" <Liam.Howlett@...cle.com>,
 Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org,
 linux-mm@...ck.org, willy@...radead.org, x86@...nel.org,
 linux-block@...r.kernel.org, Ritesh Harjani <ritesh.list@...il.com>,
 linux-fsdevel@...r.kernel.org, "Darrick J . Wong" <djwong@...nel.org>,
 mcgrof@...nel.org, gost.dev@...sung.com, hch@....de,
 Pankaj Raghav <p.raghav@...sung.com>
Subject: Re: [PATCH 0/5] add static huge zero folio support

On 06.08.25 10:31, Pankaj Raghav (Samsung) wrote:
> On Tue, Aug 05, 2025 at 09:00:40AM -0700, Dave Hansen wrote:
>> On 8/4/25 05:13, Pankaj Raghav (Samsung) wrote:
>>> Add a config option STATIC_HUGE_ZERO_FOLIO that will always allocate
>>> the huge_zero_folio, and it will never drop the reference.
>>
>> "static" is a really odd naming choice for a dynamically allocated
>> structure. It's one that's never freed, sure, but it's still dynamically
>> allocated in the first place.
> 
> That is a fair point.
> 
> I like the rename you did to PERSISTENT_HUGE_ZERO_FOLIO instead of
> STATIC_HUGE_ZERO_FOLIO as we still allocate it dynamically.
> 
> @David, @Lorenzo and @Zi: Does the rename sound good to you?

Yes, sounds good.

-- 
Cheers,

David / dhildenb