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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58471C77B73 for ; Wed, 31 May 2023 15:48:46 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id DB7848E0003; Wed, 31 May 2023 11:48:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D67728E0001; Wed, 31 May 2023 11:48:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C56158E0003; Wed, 31 May 2023 11:48:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id B73288E0001 for ; Wed, 31 May 2023 11:48:45 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 7B2651401DD for ; Wed, 31 May 2023 15:48:45 +0000 (UTC) X-FDA: 80850983010.17.DAA6CDB Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf29.hostedemail.com (Postfix) with ESMTP id BD440120018 for ; Wed, 31 May 2023 15:48:43 +0000 (UTC) Authentication-Results: imf29.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf29.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1685548123; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references; bh=v1Bv1a4nsbNflOSqmd8JJ1Kc0hidiyxUltjGX1ZcyUo=; b=Y35/r8qbdgeE3q3tq9G1fHZXDNY38XN+9otg/wfAowWJPZvHBYfMuzkCIRixJpZ9SOKaWN 2ZrOcrA2os1FUgWggvugVUNmwwsyWufENkEhBVjIZpna04kM0tiu91LhAvO+L29IbQI0y9 QjQ3aHkwavNAJ7S3liEdbVUXQDJSBS8= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf29.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1685548123; a=rsa-sha256; cv=none; b=e813XJLZIXKpXevFjJg9tQ9FbO3MwMWqn7cgsC5+VB1STYvA/Ld+OGd4oH0r5Hxl2nWG+s 8dzBAM6vbe4/w+BBbtYOagLjOyy6XCSVB0C98WfriIEghyIWl8a435i7d6SKcOjEEUpviu KxYM7dF88dh0wS0vKL6/JEH3J7weRBo= 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 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: BD440120018 X-Stat-Signature: 1uqcxp45am6g1xf3fzrkog6e3xwwh1fi X-Rspam-User: X-HE-Tag: 1685548123-752496 X-HE-Meta: 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 9bThyZaM o0caRGLs+VoNS2Nv/cd7Wpm4imcvrPNqJi57YgHpK79mP9b5u0Xj3TIBcnSOV92wMeqYJAvPNqyBDpbs/SPQUJB5PNdE7gQ4r50fvvRcDRE2qJ+w4xrzGb1QEzDGqjN/U85DpIIT5lheLRaclKeVTEcS7tjqfhSvIP4aiWGgxMcHXKSlCoevzvesByz360u7eku5/RA2TEDowCmNdh3lsVqvJAEO0YT5zD4tH6E+BSth0xFs6olN1dRy0jObfvKlwBs6yhgNQdVUM52S3epeA9n1y55isuccX+DPbGWqErrWvo9eyEBUss8HqVUIovwG2h1ZKPu4XnCS267sJbygX7giyQkJqREv1WNW6VBhJkej8Fj3suFc+mJmiokxrVCcb53in4hgMO4ZuKWIu+ssh4LKDGJGNqqqYWMK1QjGjZYp9FWe8t3QKnccuVHd6oivfIYStMCK07lZNWxaeXUQZTfRgk5GueAoX9irYXRstoh35GkALOaQlk9qmjK3Fu6gwsJ+u X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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(-)