From: Vlastimil Babka <vbabka@suse.cz>
To: Catalin Marinas <catalin.marinas@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>,
Robin Murphy <robin.murphy@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
Ard Biesheuvel <ardb@kernel.org>,
Isaac Manjarres <isaacmanjarres@google.com>,
Saravana Kannan <saravanak@google.com>,
Alasdair Kergon <agk@redhat.com>, Daniel Vetter <daniel@ffwll.ch>,
Joerg Roedel <joro@8bytes.org>, Mark Brown <broonie@kernel.org>,
Mike Snitzer <snitzer@kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Jonathan Cameron <jic23@kernel.org>,
linux-mm@kvack.org, iommu@lists.linux.dev,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v7 01/17] mm/slab: Decouple ARCH_KMALLOC_MINALIGN from ARCH_DMA_MINALIGN
Date: Tue, 13 Jun 2023 11:46:31 +0200 [thread overview]
Message-ID: <5faed13c-43f2-66ef-c42c-7d7bebb224d8@suse.cz> (raw)
In-Reply-To: <20230612153201.554742-2-catalin.marinas@arm.com>
On 6/12/23 17:31, Catalin Marinas wrote:
> In preparation for supporting a kmalloc() minimum alignment smaller than
> the arch DMA alignment, decouple the two definitions. This requires that
> either the kmalloc() caches are aligned to a (run-time) cache-line size
> or the DMA API bounces unaligned kmalloc() allocations. Subsequent
> patches will implement both options.
>
> After this patch, ARCH_DMA_MINALIGN is expected to be used in static
> alignment annotations and defined by an architecture to be the maximum
> alignment for all supported configurations/SoCs in a single Image.
> Architectures opting in to a smaller ARCH_KMALLOC_MINALIGN will need to
> define its value in the arch headers.
>
> Since ARCH_DMA_MINALIGN is now always defined, adjust the #ifdef in
> dma_get_cache_alignment() so that there is no change for architectures
> not requiring a minimum DMA alignment.
>
> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Vlastimil Babka <vbabka@suse.cz>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Tested-by: Isaac J. Manjarres <isaacmanjarres@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
next prev parent reply other threads:[~2023-06-13 9:46 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-12 15:31 [PATCH v7 00/17] mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 01/17] mm/slab: Decouple ARCH_KMALLOC_MINALIGN from ARCH_DMA_MINALIGN Catalin Marinas
2023-06-13 9:46 ` Vlastimil Babka [this message]
2023-06-13 11:13 ` Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 02/17] dma: Allow dma_get_cache_alignment() to be overridden by the arch code Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 03/17] mm/slab: Simplify create_kmalloc_cache() args and make it static Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 04/17] mm/slab: Limit kmalloc() minimum alignment to dma_get_cache_alignment() Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 05/17] drivers/base: Use ARCH_DMA_MINALIGN instead of ARCH_KMALLOC_MINALIGN Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 06/17] drivers/gpu: " Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 07/17] drivers/usb: " Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 08/17] drivers/spi: " Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 09/17] dm-crypt: " Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 10/17] iio: core: " Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 11/17] arm64: Allow kmalloc() caches aligned to the smaller cache_line_size() Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 12/17] scatterlist: Add dedicated config for DMA flags Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 13/17] dma-mapping: Name SG DMA flag helpers consistently Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 14/17] dma-mapping: Force bouncing if the kmalloc() size is not cache-line-aligned Catalin Marinas
2023-06-12 15:31 ` [PATCH v7 15/17] iommu/dma: Force bouncing if the size is not cacheline-aligned Catalin Marinas
2023-06-12 15:32 ` [PATCH v7 16/17] mm: slab: Reduce the kmalloc() minimum alignment if DMA bouncing possible Catalin Marinas
2023-06-12 15:32 ` [PATCH v7 17/17] arm64: Enable ARCH_WANT_KMALLOC_DMA_BOUNCE for arm64 Catalin Marinas
2023-07-05 13:40 ` [PATCH v7 00/17] mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 Amit Pundir
2023-07-07 0:41 ` Isaac Manjarres
2023-07-08 13:02 ` Amit Pundir
2023-07-11 19:44 ` Isaac Manjarres
2023-07-12 4:57 ` Amit Pundir
2023-07-09 3:27 ` Catalin Marinas
2025-03-28 16:41 ` John Ernberg
2025-03-28 19:38 ` Frank Li
2025-03-31 8:02 ` John Ernberg
2025-03-31 16:21 ` Frank Li
2025-04-01 12:56 ` John Ernberg
2025-04-01 16:43 ` Catalin Marinas
2025-04-02 10:35 ` John Ernberg
2025-05-02 12:02 ` John Ernberg
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