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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DE0EC88CB2 for ; Mon, 12 Jun 2023 20:04:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235702AbjFLUEp (ORCPT ); Mon, 12 Jun 2023 16:04:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40808 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235743AbjFLUEf (ORCPT ); Mon, 12 Jun 2023 16:04:35 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68683171B for ; Mon, 12 Jun 2023 13:04:31 -0700 (PDT) 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 0044262DF5 for ; Mon, 12 Jun 2023 20:04:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4BFD9C433D2; Mon, 12 Jun 2023 20:04:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1686600270; bh=Bja/8xwZyOnCPrhOmYHL3FgqR1cuhy+HoVShHTD9QGY=; h=Date:To:From:Subject:From; b=BDei8WRr2RqXxR/byApVrQMfTiVj6tLVEmb04LuA7nNnv8NvQ8bk6z3JsLotkawVz C9nZNeK0uvjuia0DdvOMHJF8JED/hAe+QtgjuiTVUvz5KAGCHf8sg7/kh/oWWzpIro ksTNImWYvPKtmr8DBQ9UM5P9N5/vlpPi5cwP7LlE= Date: Mon, 12 Jun 2023 13:04:29 -0700 To: mm-commits@vger.kernel.org, will@kernel.org, vbabka@suse.cz, snitzer@kernel.org, saravanak@google.com, robin.murphy@arm.com, rafael@kernel.org, maz@kernel.org, logang@deltatee.com, lars@metafoo.de, jsnitsel@redhat.com, joro@8bytes.org, Jonathan.Cameron@huawei.com, jic23@kernel.org, isaacmanjarres@google.com, herbert@gondor.apana.org.au, hch@lst.de, gregkh@linuxfoundation.org, daniel@ffwll.ch, broonie@kernel.org, arnd@arndb.de, ardb@kernel.org, agk@redhat.com, catalin.marinas@arm.com, akpm@linux-foundation.org From: Andrew Morton Subject: + mm-slab-reduce-the-kmalloc-minimum-alignment-if-dma-bouncing-possible.patch added to mm-unstable branch Message-Id: <20230612200430.4BFD9C433D2@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm: slab: reduce the kmalloc() minimum alignment if DMA bouncing possible has been added to the -mm mm-unstable branch. Its filename is mm-slab-reduce-the-kmalloc-minimum-alignment-if-dma-bouncing-possible.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-slab-reduce-the-kmalloc-minimum-alignment-if-dma-bouncing-possible.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Catalin Marinas Subject: mm: slab: reduce the kmalloc() minimum alignment if DMA bouncing possible Date: Mon, 12 Jun 2023 16:32:00 +0100 If an architecture opted in to DMA bouncing of unaligned kmalloc() buffers (ARCH_WANT_KMALLOC_DMA_BOUNCE), reduce the minimum kmalloc() cache alignment below cache-line size to ARCH_KMALLOC_MINALIGN. Link: https://lkml.kernel.org/r/20230612153201.554742-17-catalin.marinas@arm.com Signed-off-by: Catalin Marinas Reviewed-by: Vlastimil Babka Tested-by: Isaac J. Manjarres Cc: Christoph Hellwig Cc: Robin Murphy Cc: Alasdair Kergon Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: Daniel Vetter Cc: Greg Kroah-Hartman Cc: Herbert Xu Cc: Jerry Snitselaar Cc: Joerg Roedel Cc: Jonathan Cameron Cc: Jonathan Cameron Cc: Lars-Peter Clausen Cc: Logan Gunthorpe Cc: Marc Zyngier Cc: Mark Brown Cc: Mike Snitzer Cc: "Rafael J. Wysocki" Cc: Saravana Kannan Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/slab_common.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/mm/slab_common.c~mm-slab-reduce-the-kmalloc-minimum-alignment-if-dma-bouncing-possible +++ a/mm/slab_common.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -865,6 +866,10 @@ void __init setup_kmalloc_cache_index_ta static unsigned int __kmalloc_minalign(void) { +#ifdef CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC + if (io_tlb_default_mem.nslabs) + return ARCH_KMALLOC_MINALIGN; +#endif return dma_get_cache_alignment(); } _ Patches currently in -mm which might be from catalin.marinas@arm.com are mm-slab-decouple-arch_kmalloc_minalign-from-arch_dma_minalign.patch dma-allow-dma_get_cache_alignment-to-be-overridden-by-the-arch-code.patch mm-slab-simplify-create_kmalloc_cache-args-and-make-it-static.patch mm-slab-limit-kmalloc-minimum-alignment-to-dma_get_cache_alignment.patch drivers-base-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch drivers-gpu-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch drivers-usb-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch drivers-spi-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch dm-crypt-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch iio-core-use-arch_dma_minalign-instead-of-arch_kmalloc_minalign.patch arm64-allow-kmalloc-caches-aligned-to-the-smaller-cache_line_size.patch dma-mapping-force-bouncing-if-the-kmalloc-size-is-not-cache-line-aligned.patch iommu-dma-force-bouncing-if-the-size-is-not-cacheline-aligned.patch mm-slab-reduce-the-kmalloc-minimum-alignment-if-dma-bouncing-possible.patch arm64-enable-arch_want_kmalloc_dma_bounce-for-arm64.patch