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=-2.6 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 E81C9C282E1 for ; Fri, 24 May 2019 04:08:05 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 BD55E2175B for ; Fri, 24 May 2019 04:08:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="d4pWEaoD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD55E2175B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 81B1FDB5; Fri, 24 May 2019 04:08:05 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 940DBAA5 for ; Fri, 24 May 2019 04:08:03 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-pg1-f193.google.com (mail-pg1-f193.google.com [209.85.215.193]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 4DC68F4 for ; Fri, 24 May 2019 04:08:03 +0000 (UTC) Received: by mail-pg1-f193.google.com with SMTP id w22so4271118pgi.6 for ; Thu, 23 May 2019 21:08:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=s74YDk11h63m3BV7XOfnkCuG6v9uaJVVe9rNVON22hw=; b=d4pWEaoDp8VDALdkCMCsdpaApDEtbf5qlmNVmtFaBu1dLqdJeDQAeAOVmLHxFoOH2T 0KPvaAWTEKyeMBhm+4UC/dQvOjY/nwyM/qO/nbiRmBo9pAvmEWRw/GbN6v2yEXKE6Uif 1IVZz6BJJxpjuO+gvH0PYvuK5AFQh4McrEeM76gok5/33Q0ciesPflsroAVXZ5CsyzON H9/F8sXGiqPEYQIxTFKTAnibA8qNWGGUiMepgWhsAhmj72HmkGQ6ip5T7JMixrDb59Q5 1AG8HJWjKIuoZaWZHwFRH4weX2//KEgT50ICzsbyxb+ZFJk+oWktK+KDA2/H+LGKg1UJ zN0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=s74YDk11h63m3BV7XOfnkCuG6v9uaJVVe9rNVON22hw=; b=kREKRclCl3JnOJu4EmFLzTfNmApXOJMim6/rEY8V9MSKa3VoT3W2OOi+iJiESjm9WU EuBYPuvuuTzc9qAz6yk/TazaD9TRX5eH+oL2WAE85nbydnDDobAZDsb7xq4zOdMX4foh vRWhje3DySCj4IMfPzKM+yNqZjPts+T2rOguG+irx7rla26ZelIqVIfw1S0kOIfa+68Y GO4a8BbMDSdK4/YUIQo3A5kDyjY87SGzIUQXJQZODTUCYtZP5M5O87cCpf7w9f8LCtJp VWcze2C3WL4tW0hXGzdfFDqTFltGvkor/LCOC2EjriKHawp0Hyp3yUsBlFHfc+KrPxtr QO9w== X-Gm-Message-State: APjAAAUEc0AXTvnlS8E2ljLPz99MyNl/wM38mehFidCk0xi4tRQRor8I 7VEjdMBGu1mXbt+UDGWzwmA= X-Google-Smtp-Source: APXvYqz7SgXlmeiaXSvQX7Xs4PBLb1OsSy441YSgpyHE/mSRMUQEJbvKztTfbmY/Z7v8FcGOYR8dGA== X-Received: by 2002:aa7:9aa5:: with SMTP id x5mr18456270pfi.135.1558670882701; Thu, 23 May 2019 21:08:02 -0700 (PDT) Received: from Asurada-Nvidia.nvidia.com (thunderhill.nvidia.com. [216.228.112.22]) by smtp.gmail.com with ESMTPSA id e123sm786412pgc.29.2019.05.23.21.08.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 May 2019 21:08:02 -0700 (PDT) From: Nicolin Chen To: hch@lst.de, robin.murphy@arm.com, m.szyprowski@samsung.com Subject: [PATCH v3 0/2] Optimize dma_*_from_contiguous calls Date: Thu, 23 May 2019 21:06:31 -0700 Message-Id: <20190524040633.16854-1-nicoleotsuka@gmail.com> X-Mailer: git-send-email 2.17.1 Cc: chris@zankel.net, linux-xtensa@linux-xtensa.org, keescook@chromium.org, sfr@canb.auug.org.au, tony@atomide.com, catalin.marinas@arm.com, will.deacon@arm.com, linux@armlinux.org.uk, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, jcmvbkbc@gmail.com, wsa+renesas@sang-engineering.com, dann.frazier@canonical.com, akpm@linux-foundation.org, treding@nvidia.com, dwmw2@infradead.org, iamjoonsoo.kim@lge.com, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org [ Per discussion at v1, we decide to add two new functions and start replacing callers one by one. For this series, it only touches the dma-direct part. And instead of merging two PATCHes, I still keep them separate so that we may easily revert PATCH-2 if anything bad happens as last time -- PATCH-1 is supposed to be a safe cleanup. ] This series of patches try to optimize dma_*_from_contiguous calls: PATCH-1 abstracts two new functions and applies to dma-direct.c file. PATCH-2 saves single pages and reduce fragmentations from CMA area. Please check their commit messages for detail changelog. Nicolin Chen (2): dma-contiguous: Abstract dma_{alloc,free}_contiguous() dma-contiguous: Use fallback alloc_pages for single pages include/linux/dma-contiguous.h | 11 +++++++ kernel/dma/contiguous.c | 57 ++++++++++++++++++++++++++++++++++ kernel/dma/direct.c | 24 +++----------- 3 files changed, 72 insertions(+), 20 deletions(-) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu 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=-2.8 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 165B8C282E1 for ; Fri, 24 May 2019 04:08:17 +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 E166721841 for ; Fri, 24 May 2019 04:08:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="mq/px0Xo"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="d4pWEaoD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E166721841 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=0BnrhGvl+bpayh0LX1NHX3yI9OidGyCz/EiowN8pYPg=; b=mq/ px0XoYMkStkYZFAvBaPC90uuG4RCemqpEUxFV4YdUsBl4/twLMyuTdbGhXE10PiFVEHol7p41R+zB GI2XCz9RQx+Iai7zTsan9PIa4il7BqKl/z5/FOT1Qhoz1owp8ZOSlP5HqKxzeJkzpHlBA09OwhsgR luCSW/uyYS/SZiAfXn6kbYVgBh+417ZDQY0HUSIGwPXcSOu01syhUvsjyRD/R+MW9II0KG+kygxxC Ur04dVP8YL1STGxfa6GTis7vpmgaTqXSGgy/bZvVVZl3gmVgPgYpT6dIHryBxM4v3giT1Fa7FDn1o /NQYWPFsO2bnOxD3JQzra9f1OtlRnRg==; 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 1hU1V2-0000sT-DQ; Fri, 24 May 2019 04:08:08 +0000 Received: from mail-pg1-x541.google.com ([2607:f8b0:4864:20::541]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hU1Uz-0000r5-HM for linux-arm-kernel@lists.infradead.org; Fri, 24 May 2019 04:08:06 +0000 Received: by mail-pg1-x541.google.com with SMTP id h17so4291393pgv.0 for ; Thu, 23 May 2019 21:08:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=s74YDk11h63m3BV7XOfnkCuG6v9uaJVVe9rNVON22hw=; b=d4pWEaoDp8VDALdkCMCsdpaApDEtbf5qlmNVmtFaBu1dLqdJeDQAeAOVmLHxFoOH2T 0KPvaAWTEKyeMBhm+4UC/dQvOjY/nwyM/qO/nbiRmBo9pAvmEWRw/GbN6v2yEXKE6Uif 1IVZz6BJJxpjuO+gvH0PYvuK5AFQh4McrEeM76gok5/33Q0ciesPflsroAVXZ5CsyzON H9/F8sXGiqPEYQIxTFKTAnibA8qNWGGUiMepgWhsAhmj72HmkGQ6ip5T7JMixrDb59Q5 1AG8HJWjKIuoZaWZHwFRH4weX2//KEgT50ICzsbyxb+ZFJk+oWktK+KDA2/H+LGKg1UJ zN0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=s74YDk11h63m3BV7XOfnkCuG6v9uaJVVe9rNVON22hw=; b=ABJKUMP2jH1ZCVL4pH+ywSsFGJX44Dxv6OrX6HnnI+kmwY4bAdf+RFnj/yKcOtBWjM a/QNMzjTF2yWO8C0uT5miGiyh7HmSOVE9BXrprPqNvB3jRD+2bD3gzau4NYzWRM4FTaa +fpXE/AA+YfZ6sp2avFfZTvngcxqQt2QV2Hb1L3dzvrtfo1d0IXh0VhuTAyFQCuU1+T5 vk7KLGWhY59cWoR2isRIMndEFpAvH69djsPCKejsqikvmZqDqUqgjc1tlyEPNzDabTY7 lH3T+SrMjqLtMJUVPtBEmTwxG7MPHd7CAQ+otve3L5KpiEKc5CtYBtVyDj73QzRGpbW+ ieOg== X-Gm-Message-State: APjAAAVJGC/lZ9wDPdKN0fQe3fDUacZsyXHlRsU9WoLwfvWTsLapx8nt tYn1u60GuAycI/nUAQbjEDU= X-Google-Smtp-Source: APXvYqz7SgXlmeiaXSvQX7Xs4PBLb1OsSy441YSgpyHE/mSRMUQEJbvKztTfbmY/Z7v8FcGOYR8dGA== X-Received: by 2002:aa7:9aa5:: with SMTP id x5mr18456270pfi.135.1558670882701; Thu, 23 May 2019 21:08:02 -0700 (PDT) Received: from Asurada-Nvidia.nvidia.com (thunderhill.nvidia.com. [216.228.112.22]) by smtp.gmail.com with ESMTPSA id e123sm786412pgc.29.2019.05.23.21.08.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 May 2019 21:08:02 -0700 (PDT) From: Nicolin Chen To: hch@lst.de, robin.murphy@arm.com, m.szyprowski@samsung.com Subject: [PATCH v3 0/2] Optimize dma_*_from_contiguous calls Date: Thu, 23 May 2019 21:06:31 -0700 Message-Id: <20190524040633.16854-1-nicoleotsuka@gmail.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190523_210805_594947_200FB507 X-CRM114-Status: UNSURE ( 8.98 ) 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: chris@zankel.net, linux-xtensa@linux-xtensa.org, keescook@chromium.org, sfr@canb.auug.org.au, tony@atomide.com, catalin.marinas@arm.com, joro@8bytes.org, will.deacon@arm.com, linux@armlinux.org.uk, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, jcmvbkbc@gmail.com, wsa+renesas@sang-engineering.com, dann.frazier@canonical.com, akpm@linux-foundation.org, treding@nvidia.com, dwmw2@infradead.org, iamjoonsoo.kim@lge.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 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 [ Per discussion at v1, we decide to add two new functions and start replacing callers one by one. For this series, it only touches the dma-direct part. And instead of merging two PATCHes, I still keep them separate so that we may easily revert PATCH-2 if anything bad happens as last time -- PATCH-1 is supposed to be a safe cleanup. ] This series of patches try to optimize dma_*_from_contiguous calls: PATCH-1 abstracts two new functions and applies to dma-direct.c file. PATCH-2 saves single pages and reduce fragmentations from CMA area. Please check their commit messages for detail changelog. Nicolin Chen (2): dma-contiguous: Abstract dma_{alloc,free}_contiguous() dma-contiguous: Use fallback alloc_pages for single pages include/linux/dma-contiguous.h | 11 +++++++ kernel/dma/contiguous.c | 57 ++++++++++++++++++++++++++++++++++ kernel/dma/direct.c | 24 +++----------- 3 files changed, 72 insertions(+), 20 deletions(-) -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 9B564C072B5 for ; Fri, 24 May 2019 04:08:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58AF12175B for ; Fri, 24 May 2019 04:08:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="d4pWEaoD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727654AbfEXEIE (ORCPT ); Fri, 24 May 2019 00:08:04 -0400 Received: from mail-pg1-f194.google.com ([209.85.215.194]:38741 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725813AbfEXEID (ORCPT ); Fri, 24 May 2019 00:08:03 -0400 Received: by mail-pg1-f194.google.com with SMTP id v11so4278683pgl.5 for ; Thu, 23 May 2019 21:08:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=s74YDk11h63m3BV7XOfnkCuG6v9uaJVVe9rNVON22hw=; b=d4pWEaoDp8VDALdkCMCsdpaApDEtbf5qlmNVmtFaBu1dLqdJeDQAeAOVmLHxFoOH2T 0KPvaAWTEKyeMBhm+4UC/dQvOjY/nwyM/qO/nbiRmBo9pAvmEWRw/GbN6v2yEXKE6Uif 1IVZz6BJJxpjuO+gvH0PYvuK5AFQh4McrEeM76gok5/33Q0ciesPflsroAVXZ5CsyzON H9/F8sXGiqPEYQIxTFKTAnibA8qNWGGUiMepgWhsAhmj72HmkGQ6ip5T7JMixrDb59Q5 1AG8HJWjKIuoZaWZHwFRH4weX2//KEgT50ICzsbyxb+ZFJk+oWktK+KDA2/H+LGKg1UJ zN0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=s74YDk11h63m3BV7XOfnkCuG6v9uaJVVe9rNVON22hw=; b=b6OJbwa+VfYQ32XpSjJ+X3+rGT9bAF1wpff1IK0hN+65A3Wr6hqpF9LlAXJ3q96U54 1uFcubNdcNcW6g/QqVwBPzbEEdGu9B/uYGkYvNTzuB2Vk8XNGPRuuI+ytxAsaZcLTVvX XAJ86Qu0eXuHOqEgMbClYbJ5xg5pM53Ie+gbYyFNJ429PokWBltjHDuWChC6kKNpW25v zcyaTPO8V+d3xrbzGB00FpbW8DMDBm/VWaQ5N1EZ9PoBxE/oxYpG6ZFaOoaNU97G50a5 qDuPUWOSzJ/NTR6A01AEI6fOSeUbATrbl19KRGXucR/AvTa7kSHk0mZ75SwELjDSl1+1 /1ug== X-Gm-Message-State: APjAAAXGCDCN7mQ+Lq/vjMoM7YzrWFFZk56MVkXtUEf5SjVibxB6Eakv frUZiky+1kUhabX/+mA/nWI= X-Google-Smtp-Source: APXvYqz7SgXlmeiaXSvQX7Xs4PBLb1OsSy441YSgpyHE/mSRMUQEJbvKztTfbmY/Z7v8FcGOYR8dGA== X-Received: by 2002:aa7:9aa5:: with SMTP id x5mr18456270pfi.135.1558670882701; Thu, 23 May 2019 21:08:02 -0700 (PDT) Received: from Asurada-Nvidia.nvidia.com (thunderhill.nvidia.com. [216.228.112.22]) by smtp.gmail.com with ESMTPSA id e123sm786412pgc.29.2019.05.23.21.08.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 May 2019 21:08:02 -0700 (PDT) From: Nicolin Chen To: hch@lst.de, robin.murphy@arm.com, m.szyprowski@samsung.com Cc: vdumpa@nvidia.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, chris@zankel.net, jcmvbkbc@gmail.com, joro@8bytes.org, dwmw2@infradead.org, tony@atomide.com, akpm@linux-foundation.org, sfr@canb.auug.org.au, treding@nvidia.com, keescook@chromium.org, iamjoonsoo.kim@lge.com, wsa+renesas@sang-engineering.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-xtensa@linux-xtensa.org, iommu@lists.linux-foundation.org, dann.frazier@canonical.com Subject: [PATCH v3 0/2] Optimize dma_*_from_contiguous calls Date: Thu, 23 May 2019 21:06:31 -0700 Message-Id: <20190524040633.16854-1-nicoleotsuka@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Per discussion at v1, we decide to add two new functions and start replacing callers one by one. For this series, it only touches the dma-direct part. And instead of merging two PATCHes, I still keep them separate so that we may easily revert PATCH-2 if anything bad happens as last time -- PATCH-1 is supposed to be a safe cleanup. ] This series of patches try to optimize dma_*_from_contiguous calls: PATCH-1 abstracts two new functions and applies to dma-direct.c file. PATCH-2 saves single pages and reduce fragmentations from CMA area. Please check their commit messages for detail changelog. Nicolin Chen (2): dma-contiguous: Abstract dma_{alloc,free}_contiguous() dma-contiguous: Use fallback alloc_pages for single pages include/linux/dma-contiguous.h | 11 +++++++ kernel/dma/contiguous.c | 57 ++++++++++++++++++++++++++++++++++ kernel/dma/direct.c | 24 +++----------- 3 files changed, 72 insertions(+), 20 deletions(-) -- 2.17.1