From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1B3BBC88E7F for ; Tue, 15 Sep 2026 16:52:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2/FGGnAn7w7sq7e0RC1Dt/qRgc0jXiXNmiCmNbf2LEU=; b=N5TR5aAUmZgLkA pXaToIvzrAimiyYSARkLwlBSuaerd9YQ+/bHSeiGhp/s/+8CtMc0oTHAvABmsZ1IIvx1UBKaLYimi HGOHuAdbyYMrvwWMf9LmBNsAkegqTJTnv4jzOb5rugP0C7z2KP++naKK6FPCYaEnGRlNS7QZ3bhl9 R7hBzLLmdy+82opjit3tNGjBX2CdAt8AVOsGCRazpblz6fd9U8Ri19WhBFSZo9THZ0qlrApYC6BRM VtHK31UJGaJ49g6FjPQHKz7wmFloSwlu7Rejs1Lp4NtzgKkhTLxM/zw7jwXu6K2ducImXMBvADDov L6aFn7qZltHdEVVzcJww==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x6WO5-00000007Umk-1Qwf; Tue, 15 Sep 2026 16:52:05 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x6WO3-00000007UmC-0zR8; Tue, 15 Sep 2026 16:52:03 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 72F3C602BE; Tue, 15 Sep 2026 16:52:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 01E231F000FF; Tue, 15 Sep 2026 16:52:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789491122; bh=AAegg1HqQc2zlyPsCFndE7BU31mvGmt6H10k5+2dIJY=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=I2gPH+LFzLYZALBDt0ClbZdP2ilKcDCHRUfiBdPm3idQOsDqpB7q84aLX1rNrpsIi wqf4NIRZrAMGKEqi89jARH+zbeojQb+KDUw89DWC124dgGma0vkuOyh7VKF0jaex++ b57xMMAACGyAnBWTbpAotn+pMoUc4jo98m/cRL6VnMgiAuTr01RxuVn3RxfhUqUF2V HDTTUD4Q37fkbMXjP61re8NqNAxmKlEzdXEOYIYEP0ixfcH/BkcKa66oKfC9x6HBgf 1HGcQYQ/iY9/7C56XCgwfGL8/S8XFNbJezbtToRJkfqoCvtrHQsII7a2j185CneqPi WT5WUhI+hl6tw== Date: Tue, 15 Sep 2026 09:52:01 -0700 From: Kees Cook To: "Lorenzo Stoakes (ARM)" Cc: Linus Torvalds , Nathan Chancellor , Nicolas Schier , 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 , =?iso-8859-1?Q?Bj=F6rn?= Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , Onur =?iso-8859-1?Q?=D6zkan?= , 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 v2 20/21] kbuild: build rust crates in parallel with the rest of the build Message-ID: <202609150951.73C4F16EFB@keescook> References: <20260914-build-speedup-v2-0-39817ec5db23@kernel.org> <20260914-build-speedup-v2-20-39817ec5db23@kernel.org> <202609141133.7CA979C89@keescook> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Tue, Sep 15, 2026 at 12:58:10PM +0100, Lorenzo Stoakes (ARM) wrote: > Since this _still_ gives you a significant speed up on bigger boxes, I think > it's fine as-is. > > The LLM says a fix for this would need significant work - a cross-instance lock > and an on-demand rust/ build. So I think best as a follow-up? Sure! And I defer to the Rust folks on all of this. I just wanted to note the possibly unintended behavioral change there. Thanks for examining it! -- Kees Cook _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv