linux-kernel - Re: [PATCH] mm/huge_memory: add TRANSPARENT_HUGEPAGE

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] [day] [month] [year] [list]

Message-ID: <16b44431-5f9d-bfe4-049-4fd6a66e989a@google.com>
Date:   Fri, 2 Dec 2022 11:27:23 -0800 (PST)
From:   Hugh Dickins <hughd@...gle.com>
To:     David Rientjes <rientjes@...gle.com>
cc:     Matthew Wilcox <willy@...radead.org>, ye.xingchen@....com.cn,
        akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/huge_memory: add TRANSPARENT_HUGEPAGE_NEVER for THP

On Fri, 2 Dec 2022, David Rientjes wrote:
> On Thu, 1 Dec 2022, Matthew Wilcox wrote:
> > On Wed, Nov 30, 2022 at 04:51:46PM +0800, ye.xingchen@....com.cn wrote:
> > > From: ye xingchen <ye.xingchen@....com.cn>
> > > 
> > > Sometimes we may need the /sys/kernel/mm/transparent_hugepage/enabled to
> > > default as [never] at the first time.
> > 
> > What is going wrong with THP enabled that you need to disable it?
> > 
> 
> That would be useful to know in addition to why this needs to be part of 
> .config and not simply using the kernel command line option.

There is also the puzzle of what new feature gets added by

#ifdef CONFIG_TRANSPARENT_HUGEPAGE_NEVER
#endif

Hugh