From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 0804D43AB0; Sat, 19 Sep 2026 14:48:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789829307; cv=none; b=Z4nrSEIBpb9HV1A5hxGshe22qPKwSJyE/dQ0tj+qAzmBWe3U8Hjoyra/vADevOodxmGA/dwsdnCEBkdDHQVrW40DTFLEU5HnQg65kH4Z7zLE+tRNWJUPiIi7DGYlXBnSunxUcaZmUhqr3EUP9JUlzYeR1IEAhhXChw2WNIX8Jz8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789829307; c=relaxed/simple; bh=o1ZQ7MH5wDXQsKPIVArWrFcpJvDeJlfsiVlJBRwpoXM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=O1232K40fN2AYWFNXK+6AdwkcprhFBCXN5vODrtcb8VM9N0iksjzkl/RE2sHdjD7ofRVcMGt64BAH6pAOxy8F7dmdTU/IjizWTJHf2E7enYUoBloPA0SDCv1EkmNgnw4akzpEjuVEvPWNb42BrlLKMISqdoJyIgVQcTfpKwJ+PI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lm2k/vQk; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lm2k/vQk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F34C71F000FF; Sat, 19 Sep 2026 14:48:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789829305; bh=o1ZQ7MH5wDXQsKPIVArWrFcpJvDeJlfsiVlJBRwpoXM=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=lm2k/vQkpX7W0rWLi5B6K5eTJR1tZUnSWZJ1Ng+jIx3YZF9kLqPaBrTmlJSsCX9nh EuvRaBKJEEywI1N9lA1+7Ys7i3UdEigSw0oiv6tq1drO2Ro5ZD/N6xNN/PdGENyiry OQze/hFxIhrCHYmcl3+sCa2wi/yoXq0DmLmIj16j+oHTE4uRFAk74RVtHyd4ldYTZf IvdGdbPsJQiKDu0USoB8Ug/yRfNtvtJou/1NlysRZYAbRYTkXoHFZkW/B/7TV1HbsP RKA2Vfq/eOWP6HnxXeDQnh98UFWvAUENLTjQPoGih+Xd6pZ8oFkDU/0ix1EBwESNRN EJSaX1urbuaAw== Date: Sat, 19 Sep 2026 15:48:11 +0100 From: "Lorenzo Stoakes (ARM)" To: Nicolas Schier Cc: Kees Cook , Linus Torvalds , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Masahiro Yamada , Alexey Gladkov , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Arnd Bergmann , Catalin Marinas , Will Deacon , Mark Rutland , Ard Biesheuvel , Ilias Apalodimas , Josh Poimboeuf , Peter Zijlstra , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?B?QmrDtnJu?= Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , Onur =?utf-8?B?w5Z6a2Fu?= , Jonathan Corbet , Randy Dunlap , "Gustavo A. R. Silva" , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org, Jens Axboe , linux-hardening@vger.kernel.org Subject: Re: [PATCH v3 08/20] kbuild: cache list, composite object state per object Message-ID: References: <20260917-build-speedup-v3-0-9ecf4163ff36@kernel.org> <20260917-build-speedup-v3-8-9ecf4163ff36@kernel.org> <202609171110.438BC7477A@keescook> <20260918-godlike-devious-perch-707bf6@l-nschier-aarch64> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260918-godlike-devious-perch-707bf6@l-nschier-aarch64> On Fri, Sep 18, 2026 at 09:51:26PM +0200, Nicolas Schier wrote: > On Thu, Sep 17, 2026 at 11:11:41AM -0700, Kees Cook wrote: > > On Thu, Sep 17, 2026 at 05:06:18PM +0100, Lorenzo Stoakes (ARM) wrote: > > > Fix the issue by caching this data and looking it up instead of getting it > > > over and over again. > > > > Nit: I would describe this as "calculate these once". It _is_ caching, > > but I think with Makefiles there is an implication the "caching" means > > "write to disk". But maybe that's just me. Ack! > > +1 > > Reviewed-by: Nicolas Schier And thanks! (also to Kees :) > > -- > Nicolas -- Cheers, Lorenzo