linux-kernel - Re: [PATCH v2 0/2] dma-buf: system_heap: account for system heap allocation in memcg

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Message-ID: <CABdmKX32wj4yHAKMT7v9Na9CFwNM=Lfcop-dPYmcAt=jaygdBA@mail.gmail.com>
Date: Fri, 16 Jan 2026 09:44:46 -0800
From: "T.J. Mercier" <tjmercier@...gle.com>
To: Eric Chanudet <echanude@...hat.com>
Cc: Sumit Semwal <sumit.semwal@...aro.org>, 
	Benjamin Gaignard <benjamin.gaignard@...labora.com>, Brian Starkey <Brian.Starkey@....com>, 
	John Stultz <jstultz@...gle.com>, Christian König <christian.koenig@....com>, 
	Maxime Ripard <mripard@...hat.com>, linux-media@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] dma-buf: system_heap: account for system heap
 allocation in memcg

On Tue, Jan 13, 2026 at 1:33 PM Eric Chanudet <echanude@...hat.com> wrote:
>
> Capture dmabuf system heap allocations in memcg following prior
> conversations[1][2]. Disable this behavior by default unless configured
> by "dma_heap.mem_accounting" module parameter.
>
> [1] https://lore.kernel.org/dri-devel/Z-5GZ3kJDbhgVBPG@phenom.ffwll.local/
> [2] https://lore.kernel.org/all/CABdmKX2_UOENujpW0dXe0Z0x+4V3onfGDmHf1DMOXfDha6ddOA@mail.gmail.com/
>
> Changes in v2:
> - Add a module parameter to enable dma-buf cgroup accounting, disabled
>   by default.
> - Split system_heap logic in its own commit.
> - Link to v1: https://lore.kernel.org/lkml/20251211193106.755485-2-echanude@redhat.com/
>
> Signed-off-by: Eric Chanudet <echanude@...hat.com>
> ---
> Eric Chanudet (2):
>       dma-buf: heaps: add parameter to account allocations using cgroup
>       dma-buf: system_heap: account for system heap allocation in memcg
>
>  drivers/dma-buf/dma-heap.c          | 5 +++++
>  drivers/dma-buf/heaps/system_heap.c | 9 +++++++--
>  2 files changed, 12 insertions(+), 2 deletions(-)
> ---
> base-commit: b71e635feefc852405b14620a7fc58c4c80c0f73
> change-id: 20260102-dmabuf-heap-system-memcg-c86a381d663a
>
> Best regards,
> --
> Eric Chanudet <echanude@...hat.com>

Thanks for adding the param, LGTM. Looking forward to v3.