From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: remove the ->mapping_error method from dma_map_ops V2 Date: Thu, 29 Nov 2018 19:55:37 +0100 Message-ID: <20181129185537.GA30824@lst.de> References: <20181128074117.GA21126@lst.de> <20181128174545.GJ30658@n2100.armlinux.org.uk> <20181128180841.GM30658@n2100.armlinux.org.uk> <20181129162323.GA27068@lst.de> <20181129183132.GA30281@lst.de> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Linus Torvalds Cc: Christoph Hellwig , Russell King - ARM Linux , linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, robin.murphy@arm.com, the arch/x86 maintainers , Linux List Kernel Mailing , iommu@lists.linux-foundation.org, linux-alpha@vger.kernel.org, xen-devel@lists.xenproject.org, David Woodhouse , linux-arm-kernel@lists.infradead.org On Thu, Nov 29, 2018 at 10:53:32AM -0800, Linus Torvalds wrote: > Most of the high-performance IO is already using SG lists anyway, no? > Disk/networking/whatever. Networking basically never uses S/G lists. Block I/O mostly uses it, and graphics / media seems to have a fair amount of S/G uses, including very, erm special ones. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Thu, 29 Nov 2018 18:55:37 +0000 Subject: Re: remove the ->mapping_error method from dma_map_ops V2 Message-Id: <20181129185537.GA30824@lst.de> List-Id: References: <20181128074117.GA21126@lst.de> <20181128174545.GJ30658@n2100.armlinux.org.uk> <20181128180841.GM30658@n2100.armlinux.org.uk> <20181129162323.GA27068@lst.de> <20181129183132.GA30281@lst.de> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Linus Torvalds Cc: Christoph Hellwig , Russell King - ARM Linux , linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, robin.murphy@arm.com, the arch/x86 maintainers , Linux List Kernel Mailing , iommu@lists.linux-foundation.org, linux-alpha@vger.kernel.org, xen-devel@lists.xenproject.org, David Woodhouse , linux-arm-kernel@lists.infradead.org On Thu, Nov 29, 2018 at 10:53:32AM -0800, Linus Torvalds wrote: > Most of the high-performance IO is already using SG lists anyway, no? > Disk/networking/whatever. Networking basically never uses S/G lists. Block I/O mostly uses it, and graphics / media seems to have a fair amount of S/G uses, including very, erm special ones. 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 X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45997C169D4 for ; Thu, 29 Nov 2018 18:56:01 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 1F6E82082F for ; Thu, 29 Nov 2018 18:56:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="tP6d1m2q" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1F6E82082F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject: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=FqAmZ3JDTwBnEaUUdaL34O2lt0IiwSme/Tdy/a8zx2Y=; b=tP6d1m2qkrxpdp fd2oQHOcTiAudHpwBoZfZ7WQjXt0EGc/8k4QgNK/YhD5E8KF8wFLa3An6yAMec5WgWBhGDdTKqAdG 4Eo/ck/nByArfN3/1eC4Zc+LqNTEYt4rhaVvhwMorczIikx4ihWyxFzzs1cjqohQIlfM/TGrstInx ih7D0KTWytjmi0btx71PpxujcVaoVQ17XOMKWHSrvRYO1HNlCHh+EyixSIZ6rE6eyiyUGRXOQlo88 69kHT2JxCQ+sfv6aU26U4gNkRG43COM84Qp1R4a7r0RwHmCrg0sDkc0M1nIeitDtKDIBt7zmFekAy TkVxhCcN4gvZJT827ptA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gSRTf-0004Cj-4G; Thu, 29 Nov 2018 18:55:55 +0000 Received: from verein.lst.de ([213.95.11.211] helo=newverein.lst.de) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gSRTa-0004As-Ml for linux-arm-kernel@lists.infradead.org; Thu, 29 Nov 2018 18:55:52 +0000 Received: by newverein.lst.de (Postfix, from userid 2407) id C48E168BDF; Thu, 29 Nov 2018 19:55:37 +0100 (CET) Date: Thu, 29 Nov 2018 19:55:37 +0100 From: Christoph Hellwig To: Linus Torvalds Subject: Re: remove the ->mapping_error method from dma_map_ops V2 Message-ID: <20181129185537.GA30824@lst.de> References: <20181128074117.GA21126@lst.de> <20181128174545.GJ30658@n2100.armlinux.org.uk> <20181128180841.GM30658@n2100.armlinux.org.uk> <20181129162323.GA27068@lst.de> <20181129183132.GA30281@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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-20181129_105550_887134_FB029AE9 X-CRM114-Status: UNSURE ( 8.15 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, David Woodhouse , the arch/x86 maintainers , Russell King - ARM Linux , Linux List Kernel Mailing , iommu@lists.linux-foundation.org, linux-alpha@vger.kernel.org, xen-devel@lists.xenproject.org, robin.murphy@arm.com, Christoph Hellwig , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Nov 29, 2018 at 10:53:32AM -0800, Linus Torvalds wrote: > Most of the high-performance IO is already using SG lists anyway, no? > Disk/networking/whatever. Networking basically never uses S/G lists. Block I/O mostly uses it, and graphics / media seems to have a fair amount of S/G uses, including very, erm special ones. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel