From mboxrd@z Thu Jan 1 00:00:00 1970 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 smtp.subspace.kernel.org (Postfix) with ESMTPS id 9B4C6495526; Tue, 3 Mar 2026 16:07:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.95.11.211 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772554046; cv=none; b=CVo7W43daiPV7E+dkg51IhcTwr8KH0srJ4SGWXhHesZw6oOuxbIftZPe/S1Nb/Nwg4JCsYCDYRMCKGVEl8zaF+ekulbAt35XD9OR6jgfh317Ud30kPQSbs+hTkxLVTWhy1D3FAsd2P40WKyoAo5/a8XhpVuv3pcqlJtQfBxJ56U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772554046; c=relaxed/simple; bh=rbVWX++tqIK6Qlp84r3bZqZATxoSaQTQvF7pEKbJEyA=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=kIP9AQtmrAKRzp9GA8H9wfCOhgkiywAwdSq+Rp0dk6Ds5QOc4RJYec2DbI+Q3q5Gev80mZ+xxW6//hPeqKRmle4eQCtItiMFj/7N79Besbhx3SHYLgJ9EvQkIVxv14fJgtneu2EunG/uHE9RKAqMK5r/cVBuqOL1oyuhDGTexCY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lst.de; spf=pass smtp.mailfrom=lst.de; arc=none smtp.client-ip=213.95.11.211 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lst.de 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> Precedence: bulk X-Mailing-List: linux-alpha@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: <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. 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 BB193EDA693 for ; Tue, 3 Mar 2026 16:07:34 +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=XsP+OpKa4G+DiRJncv0H7pps+h5rqnsvhqmbOAXF5Yw=; b=A2ZrR9mBQJ3OOg z/A061IipP2nGP6GfprdbyJqYDFHacueCsRbOCXQsvK+hoNT3v7vuRLBqUncy2neCQNR8L0u0ednX dk94ydbT5IgW79uGamhxphYbQPiRlFG6qZJTHqXpx68AKsyt3SVQHNA185k/gT9QTpJP+IVXwuFAn jzc+6TwKejwcGEdgC9DlxKMj++5w9wtqyH2gf6DRbnRcV8HMsNE3INa8XN70rFPZ+WetlED6N4R8Q nIn/qbXueH9UC7fS9ZKrvqwSynE8okFzoYltfAbwBpPEIP1I3E42IAQW5ElrcwbSYi/bO63EEWPzP dQgub8xwE0Zms1QEZs0w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vxSHQ-0000000FWUg-1Dox; Tue, 03 Mar 2026 16:07:28 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vxSHN-0000000FWTH-3NCa; Tue, 03 Mar 2026 16:07:26 +0000 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> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260228065038.GH65277@quark> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260303_080726_018419_E751FB9F X-CRM114-Status: GOOD ( 15.63 ) 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 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. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv