linux-kernel - Re: [PATCH v3 1/2] mm: Optimize the ARCH_NEEDS_WEAK_PER

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: <aE-L81GzxzWBTfPb@casper.infradead.org>
Date: Mon, 16 Jun 2025 04:13:55 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Hao Ge <hao.ge@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	David Hildenbrand <david@...hat.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Mike Rapoport <rppt@...nel.org>,
	Richard Henderson <richard.henderson@...aro.org>,
	Matt Turner <mattst88@...il.com>, Dennis Zhou <dennis@...nel.org>,
	Tejun Heo <tj@...nel.org>, Christoph Lameter <cl@...ux.com>,
	Heiko Carstens <hca@...ux.ibm.com>,
	Vasily Gorbik <gor@...ux.ibm.com>,
	Alexander Gordeev <agordeev@...ux.ibm.com>,
	Christian Borntraeger <borntraeger@...ux.ibm.com>,
	Sven Schnelle <svens@...ux.ibm.com>,
	Kent Overstreet <kent.overstreet@...ux.dev>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-alpha@...r.kernel.org,
	linux-s390@...r.kernel.org, Hao Ge <gehao@...inos.cn>
Subject: Re: [PATCH v3 1/2] mm: Optimize the ARCH_NEEDS_WEAK_PER_CPU logic
 for s390/alpha architectures

On Mon, Jun 16, 2025 at 10:29:17AM +0800, Hao Ge wrote:
> +++ b/mm/Kconfig
> @@ -929,6 +929,10 @@ config ARCH_SUPPORTS_PUD_PFNMAP
>  	def_bool y
>  	depends on ARCH_SUPPORTS_HUGE_PFNMAP && HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
>  
> +# s390 and alpha should be enabled,see comments for DECLARE_PER_CPU_SECTION

This comment is inappropriate and should be removed.

> +config ARCH_NEEDS_WEAK_PER_CPU
> +       bool
> +
>  #
>  # UP and nommu archs use km based percpu allocator
>  #
> -- 
> 2.25.1
> 
>