From: Maxime Ripard <mripard@kernel.org>
To: "Christian König" <christian.koenig@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
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>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>,
Tomasz Figa <tfiga@chromium.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Ben Woodard <woodard@redhat.com>,
Hans Verkuil <hverkuil@xs4all.nl>,
Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
iommu@lists.linux.dev, linux-media@vger.kernel.org,
dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org
Subject: Re: [PATCH RFC 00/12] dma: Enable dmem cgroup tracking
Date: Mon, 10 Mar 2025 15:26:52 +0100 [thread overview]
Message-ID: <20250310-eccentric-wonderful-puffin-ddbb26@houat> (raw)
In-Reply-To: <f5fdc666-dd72-4a4f-9270-b539a3179382@amd.com>
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Hi,
On Mon, Mar 10, 2025 at 03:16:53PM +0100, Christian König wrote:
> [Adding Ben since we are currently in the middle of a discussion
> regarding exactly that problem]
>
> Just for my understanding before I deep dive into the code: This uses
> a separate dmem cgroup and does not account against memcg, don't it?
Yes. The main rationale being that it doesn't always make sense to
register against memcg: a lot of devices are going to allocate from
dedicated chunks of memory that are either carved out from the main
memory allocator, or not under Linux supervision at all.
And if there's no way to make it consistent across drivers, it's not the
right tool.
Maxime
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next prev parent reply other threads:[~2025-03-10 14:26 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-10 12:06 Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 01/12] cma: Register dmem region for each cma region Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 02/12] cma: Provide accessor to cma dmem region Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 03/12] dma: coherent: Register dmem region for each coherent region Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 04/12] dma: coherent: Provide accessor to dmem region Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 05/12] dma: contiguous: " Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 06/12] dma: direct: " Maxime Ripard
2025-03-10 14:56 ` Robin Murphy
2025-03-10 16:28 ` Maxime Ripard
2025-03-10 18:44 ` Robin Murphy
2025-03-13 18:16 ` Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 07/12] dma: Create default dmem region for DMA allocations Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 08/12] dma: Provide accessor to dmem region Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 09/12] dma-buf: Clear cgroup accounting on release Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 10/12] dma-buf: cma: Account for allocations in dmem cgroup Maxime Ripard
2025-03-10 12:06 ` [PATCH RFC 11/12] drm/gem: Add cgroup memory accounting Maxime Ripard
2025-03-10 15:06 ` Robin Murphy
2025-03-10 12:06 ` [PATCH RFC 12/12] media: videobuf2: Track buffer allocations through the dmem cgroup Maxime Ripard
2025-03-10 12:15 ` [PATCH RFC 00/12] dma: Enable dmem cgroup tracking Maxime Ripard
2025-03-10 14:16 ` Christian König
2025-03-10 14:26 ` Maxime Ripard [this message]
2025-03-31 20:43 ` Dave Airlie
2025-04-01 11:03 ` Christian König
2025-04-03 6:07 ` Dave Airlie
2025-04-03 7:39 ` Christian König
2025-04-03 15:47 ` Maxime Ripard
2025-04-04 8:47 ` Christian König
2025-04-05 1:57 ` T.J. Mercier
2025-04-07 11:46 ` Christian König
2025-04-08 1:03 ` T.J. Mercier
2025-04-03 8:27 ` Simona Vetter
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