linux-kernel - Re: [PATCH RFC v3 01/35] mm: page_alloc: Add gfp_flags parameter to arch_alloc

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 for Android: free password hash cracker in your pocket

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

Message-ID: <Zbjj4fin09_TCQp8@raptor>
Date: Tue, 30 Jan 2024 11:56:31 +0000
From: Alexandru Elisei <alexandru.elisei@....com>
To: Anshuman Khandual <anshuman.khandual@....com>
Cc: catalin.marinas@....com, will@...nel.org, oliver.upton@...ux.dev,
	maz@...nel.org, james.morse@....com, suzuki.poulose@....com,
	yuzenghui@...wei.com, arnd@...db.de, akpm@...ux-foundation.org,
	mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
	vincent.guittot@...aro.org, dietmar.eggemann@....com,
	rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
	bristot@...hat.com, vschneid@...hat.com, mhiramat@...nel.org,
	rppt@...nel.org, hughd@...gle.com, pcc@...gle.com,
	steven.price@....com, vincenzo.frascino@....com, david@...hat.com,
	eugenis@...gle.com, kcc@...gle.com, hyesoo.yu@...sung.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kvmarm@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-mm@...ck.org,
	linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH RFC v3 01/35] mm: page_alloc: Add gfp_flags parameter to
 arch_alloc_page()

Hi,

On Tue, Jan 30, 2024 at 09:56:10AM +0530, Anshuman Khandual wrote:
> 
> 
> On 1/29/24 17:11, Alexandru Elisei wrote:
> > Hi,
> > 
> > On Mon, Jan 29, 2024 at 11:18:59AM +0530, Anshuman Khandual wrote:
> >> On 1/25/24 22:12, Alexandru Elisei wrote:
> >>> Extend the usefulness of arch_alloc_page() by adding the gfp_flags
> >>> parameter.
> >> Although the change here is harmless in itself, it will definitely benefit
> >> from some additional context explaining the rationale, taking into account
> >> why-how arch_alloc_page() got added particularly for s390 platform and how
> >> it's going to be used in the present proposal.
> > arm64 will use it to reserve tag storage if the caller requested a tagged
> > page. Right now that means that __GFP_ZEROTAGS is set in the gfp mask, but
> > I'll rename it to __GFP_TAGGED in patch #18 ("arm64: mte: Rename
> > __GFP_ZEROTAGS to __GFP_TAGGED") [1].
> > 
> > [1] https://lore.kernel.org/lkml/20240125164256.4147-19-alexandru.elisei@arm.com/
> 
> Makes sense, but please do update the commit message explaining how
> new gfp mask argument will be used to detect tagged page allocation
> requests, further requiring tag storage allocation.

Will do, thanks!

Alex