linux-kernel - Re: [PATCH 0/2] mm: vmalloc: Actually use the in-place vrealloc region

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Message-ID: <aCbcEWR9RbjFjXV9@pc636>
Date: Fri, 16 May 2025 08:32:49 +0200
From: Uladzislau Rezki <urezki@...il.com>
To: Kees Cook <kees@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Shung-Hsi Yu <shung-hsi.yu@...e.com>,
	Eduard Zingerman <eddyz87@...il.com>,
	Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Erhard Furtner <erhard_f@...lbox.org>,
	Danilo Krummrich <dakr@...nel.org>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, bpf@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH 0/2] mm: vmalloc: Actually use the in-place vrealloc
 region

On Thu, May 15, 2025 at 02:42:14PM -0700, Kees Cook wrote:
> Hi,
> 
> 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.
> 
> Thanks!
> 
> -Kees
> 
> [1] https://lore.kernel.org/lkml/20250515-bpf-verifier-slowdown-vwo2meju4cgp2su5ckj@6gi6ssxbnfqg/
> 
> Kees Cook (2):
>   mm: vmalloc: Actually use the in-place vrealloc region
>   mm: vmalloc: Only zero-init on vrealloc shrink
> 
>  mm/vmalloc.c | 13 ++++++++-----
>  1 file changed, 8 insertions(+), 5 deletions(-)
> 
Looks good to me both.

Reviewed-by: "Uladzislau Rezki (Sony)" <urezki@...il.com>

--
Uladzislau Rezki