From patchwork Wed May 31 15:48:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Catalin Marinas X-Patchwork-Id: 13262466 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 CD084C7EE2D for ; Wed, 31 May 2023 15:49:06 +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:MIME-Version:Message-Id:Date:Subject:Cc :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=jbgfl5oGLIVZ4c49l2O35drKA6FCaM0+1xV6PlLbC6k=; b=LjaurCQ6/upvxc UouCe1STsT7VdvtwZ2Jt3Za6o8WbShH9J4hO/1/TuqhLFvW96lV++W+GXXoupBTBOn/1NZn3RN7Y3 fpzjucZ2aOCUhLaqvSrMN3Tm5vakzWQDgm386i3ujnzzvH2CC2Z4co/ujjVk4nKQI6h1JmFfY6lyi k8FEjfF8ZxycMStpDIbZ6NwFz96oxLxuZZZzXIfRRGsogwGt99bwRp63uzb/J+4oKDy+HOIG7y+2w y+KuWE5NWZFQWDJpSBq8TTiRQ+1A1p/48mCldXny5q3+jVsWuX7EiQFosLzOJdnFri1s1gZ79fTMK 9uEQgGgo6Tl1B+shlSrg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q4O46-000LPS-1X; Wed, 31 May 2023 15:48:46 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q4O43-000LNZ-0t for linux-arm-kernel@lists.infradead.org; Wed, 31 May 2023 15:48:44 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9A8136288E; Wed, 31 May 2023 15:48:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 550CEC433D2; Wed, 31 May 2023 15:48:38 +0000 (UTC) From: Catalin Marinas To: Linus Torvalds , Christoph Hellwig , Robin Murphy Cc: Arnd Bergmann , Greg Kroah-Hartman , Will Deacon , Marc Zyngier , Andrew Morton , Herbert Xu , Ard Biesheuvel , Isaac Manjarres , Saravana Kannan , Alasdair Kergon , Daniel Vetter , Joerg Roedel , Mark Brown , Mike Snitzer , "Rafael J. Wysocki" , Jonathan Cameron , linux-mm@kvack.org, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH v6 00/17] mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 Date: Wed, 31 May 2023 16:48:19 +0100 Message-Id: <20230531154836.1366225-1-catalin.marinas@arm.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230531_084843_398197_64830DDF X-CRM114-Status: GOOD ( 15.92 ) 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 Hi, Here's version 6 of the series reducing the kmalloc() minimum alignment on arm64 to 8 (from 128). There are patches already to do the same for riscv (pretty straight-forward after this series). The first 11 patches decouple ARCH_KMALLOC_MINALIGN from ARCH_DMA_MINALIGN and, for arm64, limit the kmalloc() caches to those aligned to the run-time probed cache_line_size(). On arm64 we gain the kmalloc-{64,192} caches. The subsequent patches (11 to 17) further reduce the kmalloc() caches to kmalloc-{8,16,32,96} if the default swiotlb is present by bouncing small buffers in the DMA API. Changes since v5: - Renaming of the sg_* accessors for consistency. - IIO_DMA_MINALIGN defined to ARCH_DMA_MINALIGN (missed it in previous versions). - Modified Robin's patch 11 to use #ifdef CONFIG_NEED_SG_DMA_FLAGS instead of CONFIG_PCI_P2PDMA in scatterlist.h. - Added the new sg_dma_*_swiotlb() under the same #ifdef as above. The updated patches are also available on this branch: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux devel/kmalloc-minalign Thanks. Catalin Marinas (15): mm/slab: Decouple ARCH_KMALLOC_MINALIGN from ARCH_DMA_MINALIGN dma: Allow dma_get_cache_alignment() to be overridden by the arch code mm/slab: Simplify create_kmalloc_cache() args and make it static mm/slab: Limit kmalloc() minimum alignment to dma_get_cache_alignment() drivers/base: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN drivers/gpu: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN drivers/usb: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN drivers/spi: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN dm-crypt: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN iio: core: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN arm64: Allow kmalloc() caches aligned to the smaller cache_line_size() dma-mapping: Force bouncing if the kmalloc() size is not cache-line-aligned iommu/dma: Force bouncing if the size is not cacheline-aligned mm: slab: Reduce the kmalloc() minimum alignment if DMA bouncing possible arm64: Enable ARCH_WANT_KMALLOC_DMA_BOUNCE for arm64 Robin Murphy (2): scatterlist: Add dedicated config for DMA flags dma-mapping: Name SG DMA flag helpers consistently arch/arm64/Kconfig | 1 + arch/arm64/include/asm/cache.h | 3 ++ arch/arm64/mm/init.c | 7 +++- drivers/base/devres.c | 6 ++-- drivers/gpu/drm/drm_managed.c | 6 ++-- drivers/iommu/Kconfig | 1 + drivers/iommu/dma-iommu.c | 58 ++++++++++++++++++++++++-------- drivers/iommu/iommu.c | 2 +- drivers/md/dm-crypt.c | 2 +- drivers/pci/Kconfig | 1 + drivers/spi/spidev.c | 2 +- drivers/usb/core/buffer.c | 8 ++--- include/linux/dma-map-ops.h | 61 ++++++++++++++++++++++++++++++++++ include/linux/dma-mapping.h | 4 ++- include/linux/iio/iio.h | 2 +- include/linux/scatterlist.h | 60 ++++++++++++++++++++++++++------- include/linux/slab.h | 14 ++++++-- kernel/dma/Kconfig | 7 ++++ kernel/dma/direct.c | 2 +- kernel/dma/direct.h | 3 +- mm/slab.c | 6 +--- mm/slab.h | 5 ++- mm/slab_common.c | 46 +++++++++++++++++++------ 23 files changed, 243 insertions(+), 64 deletions(-) Tested-by: Isaac J. Manjarres