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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 A4F61EDA693 for ; Tue, 3 Mar 2026 16:07:28 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4fQLKq0RNPz3c5c; Wed, 04 Mar 2026 03:07:27 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=213.95.11.211 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1772554047; cv=none; b=KtQJ7uZPwvJQ2xxRJhYj/c/hduJnER4LH7ICMq3sYva4Tphi5yQbsgkSowNDl+bVRO2kw/bgUTGMl0akviYw8RydSalulJd4oBIqcuLkOQ8t4rKj0AWX/td+4qWJzxTU+Utgxd6s84ne1Jt6YYWyD/9X0mnm19p8XgawkQKyRJFbGuF+AiUFQe9xhTqKQB4a/yVY15Epzn8nMMlcZCp/LqFLiMfC8WaVm4Xl/lLjdg7msUtfLClqYHb7ycJiH83zZdVss/6mhwIjO4Vm3oREVHW7H3pLOyjomt1BIic+5beQ7kKlXKVaDfO8IB0YHZ3lgK2vMv6KRzAYjs0XaA0H6Q== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1772554047; c=relaxed/relaxed; bh=r8lJVD/PQeT6XriIpZpNlanisKiLqrl1y5XP0+YUjGE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ZeC46Wp2wVt+6sui8iLA3Z0dTAILHiROQLGRbCGPLqtPu0ZsUvpB3c2tSBK35byxohMEp7hukudGZdGegKZ5Qm35di3+fce0wgDigKxFK3gWkeJ5W5vWL4koUJC5/3Kpl5QzDoKaUr36n82O6NwH8VQzFt2PAjQJWlmz5Tt4k9s+drFBncV/vgEeOkuMxCReBIAdkyxBelTs//3Fqi70FMvLwytJEZ7BhavXs/YIEnKNyYNZT+8Cj/0onPCbnKB6o0LjqVmKN6YdDvkuVRXXS4+tVq2PVTxBcb9NcDNoi6ywg1zfv70A+8pET28Rm45KYotROznmkMZFxL8iGsRkug== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=lst.de; spf=pass (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=lists.ozlabs.org) smtp.mailfrom=lst.de Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=lst.de Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lst.de (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=lists.ozlabs.org) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4fQLKp2jlMz3bsC for ; Wed, 04 Mar 2026 03:07:26 +1100 (AEDT) Received: by verein.lst.de (Postfix, from userid 2407) id 4F76C68C4E; Tue, 3 Mar 2026 17:07:22 +0100 (CET) Date: Tue, 3 Mar 2026 17:07:21 +0100 From: Christoph Hellwig To: Eric Biggers Cc: Christoph Hellwig , Andrew Morton , Richard Henderson , Matt Turner , Magnus Lindholm , Russell King , Catalin Marinas , Will Deacon , 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 , "David S. Miller" , Andreas Larsson , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Herbert Xu , Dan Williams , Chris Mason , David Sterba , Arnd Bergmann , Song Liu , Yu Kuai , Li Nan , linux-alpha@vger.kernel.org, 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, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-crypto@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-arch@vger.kernel.org, linux-raid@vger.kernel.org Subject: Re: [PATCH 21/25] xor: add a better public API Message-ID: <20260303160721.GH7021@lst.de> References: <20260226151106.144735-1-hch@lst.de> <20260226151106.144735-22-hch@lst.de> <20260228065038.GH65277@quark> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260228065038.GH65277@quark> User-Agent: Mutt/1.5.17 (2007-11-01) On Fri, Feb 27, 2026 at 10:50:38PM -0800, Eric Biggers wrote: > The alignment requirements on the vectors should be documented, as > should which values of bytes are accepted. It looks like, at the very > least, the vectors have to be 32-byte aligned and the length has to be a > nonzero multiple of 512 bytes. But I didn't check every implementation. That would match the original use case in the md raid code and also in file system uses such as btrfs, yes.