From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 84E9F1B042C; Tue, 20 May 2025 00:06:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747699568; cv=none; b=VMMzPRC6XfcggBmIqN5WPSuwdDs5wkO3jOC0XG3nbzQp4J6yiAhnPa+ho3eiD/rN3rXzMlPSRAs299Q5BHX4QZ2WvbnEqb/ES/tVB3gz7BfilfJ+CWQNywZQtO1EgvBv+M3XCrBL4PeFgyPplCQsMbk6+bKFS4ioQoqCew4bRGU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747699568; c=relaxed/simple; bh=MLmWWAhsV7Skm2n1JrtLQVRQUmxUvpFL/4s1COZZ7iQ=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=JXSHAhuRpgIiS5qS1U3nmuKb9Hk61FIHv4UfVmulH1D3mdo+aWjxKCaAfanpsF89h1KWx5Yeq95eF1v+0vZRTanJkrlzdR8Rf+JcDwl8YW+jZiDbBDCIFpHo9jQKOqGIvkSSkyA7ANCZ2O/4xLEitMRQwUf6lIzJZCZT6xMq0b0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=UBmmaPDs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="UBmmaPDs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9DC21C4CEE4; Tue, 20 May 2025 00:06:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1747699568; bh=MLmWWAhsV7Skm2n1JrtLQVRQUmxUvpFL/4s1COZZ7iQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=UBmmaPDsoZYHx8Fdql+2DqKX0LL8iTPmo2xcINgKzMPZYqFhYe1kVcCf2fr7a/cAE eQakaes0uMmbRDB+dnnWf9zQlY5cquv6lIIUHuKPvca7GcGQNPap5VVt1eIOo0GNib Jn0EbPaXeXr0KHgO2tsJ6nTe13i8+QOQ/OwuiINY= Date: Mon, 19 May 2025 17:06:07 -0700 From: Andrew Morton To: Kees Cook Cc: Shung-Hsi Yu , Eduard Zingerman , Pawan Gupta , Uladzislau Rezki , Erhard Furtner , Danilo Krummrich , 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: <20250519170607.b8d9c23bb928935d19b333fa@linux-foundation.org> In-Reply-To: <202505191217.B047E005F2@keescook> References: <20250515214020.work.519-kees@kernel.org> <202505191217.B047E005F2@keescook> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Mon, 19 May 2025 12:18:42 -0700 Kees Cook 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? > Andrew, can you get these to Linus this week? Sure.