linux-kernel - Re: [PATCH] mm: kvmalloc: make kmalloc fast path real fast path

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: <aECTg4r_a-Rp8cqP@casper.infradead.org>
Date: Wed, 4 Jun 2025 19:42:11 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Dave Chinner <david@...morbit.com>
Cc: Michal Hocko <mhocko@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Yafang Shao <laoar.shao@...il.com>,
	Harry Yoo <harry.yoo@...cle.com>, Kees Cook <kees@...nel.org>,
	joel.granados@...nel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, Josef Bacik <josef@...icpanda.com>,
	linux-mm@...ck.org, Vlastimil Babka <vbabka@...e.cz>
Subject: Re: [PATCH] mm: kvmalloc: make kmalloc fast path real fast path

On Wed, Apr 09, 2025 at 11:10:02AM +1000, Dave Chinner wrote:
> On Thu, Apr 03, 2025 at 09:51:44PM +0200, Michal Hocko wrote:
> > Add Andrew
> > 
> > Also, Dave do you want me to redirect xlog_cil_kvmalloc to kvmalloc or
> > do you preffer to do that yourself?
> 
> I'll do it when the kvmalloc patches evntually land and I can do
> back to back testing to determine if the new kvmalloc code behaves
> as expected...
> 
> Please cc me on the new patches you send that modify the kvmalloc
> behaviour.

FWIW, this has now landed in Linus' tree as 46459154f997:

                if (!(flags & __GFP_RETRY_MAYFAIL))
-                       flags |= __GFP_NORETRY;
+                       flags &= ~__GFP_DIRECT_RECLAIM;