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Date: Tue, 20 May 2025 09:06:10 -0700
From: Kees Cook <kees@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Shung-Hsi Yu <shung-hsi.yu@suse.com>,
	Eduard Zingerman <eddyz87@gmail.com>,
	Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
	Uladzislau Rezki <urezki@gmail.com>,
	Erhard Furtner <erhard_f@mailbox.org>,
	Danilo Krummrich <dakr@kernel.org>, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org, bpf@vger.kernel.org,
	linux-hardening@vger.kernel.org
Subject: Re: [PATCH 0/2] mm: vmalloc: Actually use the in-place vrealloc
 region
Message-ID: <202505200904.474938A8B5@keescook>
References: <20250515214020.work.519-kees@kernel.org>
 <202505191217.B047E005F2@keescook>
 <20250519170607.b8d9c23bb928935d19b333fa@linux-foundation.org>
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In-Reply-To: <20250519170607.b8d9c23bb928935d19b333fa@linux-foundation.org>

On Mon, May 19, 2025 at 05:06:07PM -0700, Andrew Morton wrote:
> On Mon, 19 May 2025 12:18:42 -0700 Kees Cook <kees@kernel.org> wrote:
> 
> > On Thu, May 15, 2025 at 02:42:14PM -0700, Kees Cook wrote:
> > > This fixes a performance regression[1] with vrealloc(). This needs to
> > > get into v6.15, which is where the regression originates, and then it'll
> > > get backport to the -stable releases as well.
> 
> No -stable backporting will be needed?

I think it will, since the vrealloc patches were backported
automatically, e.g. in v6.14.y: 0b391a520b4e ("mm: vmalloc: support more
granular vrealloc() sizing")

> > Andrew, can you get these to Linus this week?
> 
> Sure.

Thanks!

-- 
Kees Cook