On Fri, Jan 16, 2026 at 12:06 PM Eric Chanudet echanude@redhat.com wrote:
The system dma-buf heap lets userspace allocate buffers from the page allocator. However, these allocations are not accounted for in memcg, allowing processes to escape limits that may be configured.
Pass __GFP_ACCOUNT for system heap allocations, based on the dma_heap.mem_accounting parameter, to use memcg and account for them.
Signed-off-by: Eric Chanudet echanude@redhat.com
Reviewed-by: T.J. Mercier tjmercier@google.com
Hello Eric,
On Sat, 17 Jan 2026 at 04:07, T.J. Mercier tjmercier@google.com wrote:
On Fri, Jan 16, 2026 at 12:06 PM Eric Chanudet echanude@redhat.com wrote:
The system dma-buf heap lets userspace allocate buffers from the page allocator. However, these allocations are not accounted for in memcg, allowing processes to escape limits that may be configured.
Pass __GFP_ACCOUNT for system heap allocations, based on the dma_heap.mem_accounting parameter, to use memcg and account for them.
Signed-off-by: Eric Chanudet echanude@redhat.com
Reviewed-by: T.J. Mercier tjmercier@google.com
Thank you for the series; LGTM, I'll push it tonight to drm-misc-next.
Best, Sumit.
linaro-mm-sig@lists.linaro.org
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Sumit Semwal -
T.J. Mercier