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 096D7C43458 for ; Mon, 29 Jun 2026 12:49:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ZnCdA3RZ8rzOBYeB70O433uBRb2J0cxlC2SD87W2TX0=; b=Q/xEXqfygMOLySHW1UmbP3wE6+ k8uAcOUOXlurDGBDIBbjTZEObSBjR709O5Aamv7eJT8tL0GkKEITkgJrdGnpK55NN2ABBEZqXkhOS 1E7bv/uEN3cqAXVUui1m9aR4VTv8/Ijrt3rT8fPUrwEUwA/AJEHOz0jrqXnVLqbTlgBQAV+DkTBnx p547Lv+iJEVRRpeh3wiOKhsqbN3WOychRtHMFFU8mvaKM7c0p2u/9XGJ+sBXy2ew9gA8BaD3bti14 eRxUX/GXSzZ5X5SWeXbS37t5oKJShbpqpTC6gw5Pbcu22ZXpJbj8nI5VCvYsErtM/XFnpyRcbnl0K d4WsrVKw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1weBQ9-0000000EcYU-1Wz4; Mon, 29 Jun 2026 12:49:05 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1weBQ6-0000000EcXW-40Zc; Mon, 29 Jun 2026 12:49:04 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 8495D68B05; Mon, 29 Jun 2026 14:48:57 +0200 (CEST) Date: Mon, 29 Jun 2026 14:48:56 +0200 From: Christoph Hellwig To: "H. Peter Anvin" Cc: Christoph Hellwig , Andrew Morton , Catalin Marinas , Will Deacon , Ard Biesheuvel , Huacai Chen , WANG Xuerui , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Herbert Xu , Dan Williams , Chris Mason , David Sterba , Arnd Bergmann , Song Liu , Yu Kuai , Li Nan , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-crypto@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-arch@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: cleanup the RAID6 P/Q library v3 Message-ID: <20260629124856.GA23695@lst.de> References: <20260518051804.462141-1-hch@lst.de> <20260518141205.c100f76eec5f58e78bbbf7af@linux-foundation.org> <20260519082432.GA14956@lst.de> <7d8efc7c-65e3-49f8-9381-910de7affef2@zytor.com> <20260629122152.GA21344@lst.de> <8684FEC2-AD56-4BDA-874F-1D3D7170F880@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8684FEC2-AD56-4BDA-874F-1D3D7170F880@zytor.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260629_054903_141307_59433236 X-CRM114-Status: GOOD ( 13.11 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jun 29, 2026 at 05:34:41AM -0700, H. Peter Anvin wrote: > The real issue though is that the benchmarking isn't really helpful, either. > > It has to do with power across the whole chip, so it perversely enough depends on what *else* is going on... Yes. And preferences might matter if this is just a file server or something running a real workload as well. But I don't really have a good answer to that.