From: "David Hildenbrand (Arm)" <david@kernel.org>
To: "Thierry Reding" <thierry.reding@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Jonathan Hunter" <jonathanh@nvidia.com>,
"David Airlie" <airlied@gmail.com>,
"Simona Vetter" <simona@ffwll.ch>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Sowjanya Komatineni" <skomatineni@nvidia.com>,
"Luca Ceresoli" <luca.ceresoli@bootlin.com>,
"Mikko Perttunen" <mperttunen@nvidia.com>,
"Yury Norov" <yury.norov@gmail.com>,
"Rasmus Villemoes" <linux@rasmusvillemoes.dk>,
"Russell King" <linux@armlinux.org.uk>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Gerald Schaefer" <gerald.schaefer@linux.ibm.com>,
"Heiko Carstens" <hca@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Sven Schnelle" <svens@linux.ibm.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Lorenzo Stoakes" <ljs@kernel.org>,
"Liam R. Howlett" <liam@infradead.org>,
"Vlastimil Babka" <vbabka@kernel.org>,
"Mike Rapoport" <rppt@kernel.org>,
"Suren Baghdasaryan" <surenb@google.com>,
"Michal Hocko" <mhocko@suse.com>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Robin Murphy" <robin.murphy@arm.com>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Benjamin Gaignard" <benjamin.gaignard@collabora.com>,
"Brian Starkey" <Brian.Starkey@arm.com>,
"John Stultz" <jstultz@google.com>,
"T.J. Mercier" <tjmercier@google.com>,
"Christian König" <christian.koenig@amd.com>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Masami Hiramatsu" <mhiramat@kernel.org>,
"Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>,
devicetree@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-media@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org,
linux-mm@kvack.org, iommu@lists.linux.dev,
linaro-mm-sig@lists.linaro.org,
linux-trace-kernel@vger.kernel.org,
Thierry Reding <treding@nvidia.com>
Subject: Re: [PATCH v3 06/11] mm/cma: Allow dynamically creating CMA areas
Date: Fri, 3 Jul 2026 20:29:06 +0200 [thread overview]
Message-ID: <58458578-a6fb-40c8-838f-9a06a7371f76@kernel.org> (raw)
In-Reply-To: <20260701-tegra-vpr-v3-6-d80f7b871bb4@nvidia.com>
On 7/1/26 18:08, Thierry Reding wrote:
> From: Thierry Reding <treding@nvidia.com>
>
> There is no technical reason why there should be a limited number of CMA
> regions, so extract some code into helpers and use them to create extra
> functions (cma_create() and cma_free()) that allow creating and freeing,
> respectively, CMA regions dynamically at runtime.
>
> The static array of CMA areas cannot be replaced by dynamically created
> areas because for many of them, allocation must not fail and some cases
> may need to initialize them before the slab allocator is even available.
> To account for this, keep these "early" areas in a separate list and
> track the dynamic areas in a separate list.
I want MM maintainers to review/ack this before this gets merged.
I'm putting it on my todo list for next week (please ping me if it falls down
the cracks and nobody else ends up reviewing it in the meantime).
--
Cheers,
David
next prev parent reply other threads:[~2026-07-03 18:29 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-01 16:08 [PATCH v3 00/11] dma-buf: heaps: Add support for Tegra VPR Thierry Reding
2026-07-01 16:08 ` [PATCH v3 01/11] dt-bindings: reserved-memory: Document " Thierry Reding
2026-07-01 19:53 ` Rob Herring (Arm)
2026-07-02 12:58 ` Thierry Reding
2026-07-01 16:08 ` [PATCH v3 02/11] dt-bindings: display: tegra: Document memory regions Thierry Reding
2026-07-01 19:53 ` Rob Herring (Arm)
2026-07-02 13:47 ` Thierry Reding
2026-07-01 16:08 ` [PATCH v3 03/11] dt-bindings: gpu: host1x: Document memory-regions for NVDEC Thierry Reding
2026-07-01 16:08 ` [PATCH v3 04/11] arm64/mm: Add set_memory_device() and set_memory_normal() Thierry Reding
2026-07-02 9:18 ` Will Deacon
2026-07-02 13:46 ` Thierry Reding
2026-07-02 16:41 ` Thierry Reding
2026-07-03 17:13 ` Will Deacon
2026-07-01 16:08 ` [PATCH v3 05/11] bitmap: Add bitmap_allocate() function Thierry Reding
2026-07-01 16:08 ` [PATCH v3 06/11] mm/cma: Allow dynamically creating CMA areas Thierry Reding
2026-07-03 18:29 ` David Hildenbrand (Arm) [this message]
2026-07-01 16:08 ` [PATCH v3 07/11] dma-buf: heaps: Add debugfs support Thierry Reding
2026-07-03 12:14 ` Maxime Ripard
2026-07-01 16:08 ` [PATCH v3 08/11] dma-buf: heaps: Add support for Tegra VPR Thierry Reding
2026-07-01 16:08 ` [PATCH v3 09/11] arm64: tegra: Add VPR placeholder node on Tegra234 Thierry Reding
2026-07-01 16:08 ` [PATCH v3 10/11] arm64: tegra: Hook up VPR to host1x Thierry Reding
2026-07-01 16:08 ` [PATCH v3 11/11] arm64: tegra: Add VPR placeholder node on Tegra264 Thierry Reding
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