dma buffer sharing framework · Maintained

Maintainers

• M Sumit Semwal <sumit.semwal@linaro.org>
• M Christian König <christian.koenig@amd.com>

Paths

• F Documentation/driver-api/dma-buf.rst
• F Documentation/userspace-api/dma-buf-alloc-exchange.rst
• F drivers/dma-buf/
• F include/linux/*fence.h
• F include/linux/dma-buf.h
• F include/linux/dma-buf/
• F include/linux/dma-resv.h
• F rust/helpers/dma-resv.c

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH v2 0/6] sched: Add support for long task name
  2026-05-24 22:39 · 1 reply in 7d · André Almeida <andrealmeid@igalia.com>

Active reviewers (last 30 days)

• Bhupesh <hidden>
  2 attestations (2 Co-developed-by) · last on 2026-05-24

Recent patches

Most-recent 30 patches in this subsystem on linux-mm (capped at 30), ordered by date desc.

• HOTtoday [PATCH v2 2/6] treewide: Get rid of get_task_comm()
  2026-05-24 · André Almeida <andrealmeid@igalia.com>
• COOLING9d [PATCH 2/6] treewide: Get rid of get_task_comm()
  2026-05-17 · André Almeida <andrealmeid@igalia.com>
• COOLING10d [PATCH RFC 3/5] security: dma-heap: Add dma_heap_alloc LSM hook
  2026-05-12 · Albert Esteve <hidden>
• COOLING10d [PATCH RFC 2/5] dma-heap: charge dma-buf memory via explicit memcg
  2026-05-12 · Albert Esteve <hidden>
• COOLING10d [PATCH RFC 1/5] memcg: Track exported dma-buffers
  2026-05-12 · Albert Esteve <hidden>
• COLD57d REVIEWED: 1 (1M) [PATCH v4 8/8] dma-buf: heaps: system: Turn the heap into a module
  2026-03-31 · Maxime Ripard <mripard@kernel.org>
• COLD57d REVIEWED: 1 (1M) [PATCH v4 7/8] dma-buf: heaps: cma: Turn the heap into a module
  2026-03-31 · Maxime Ripard <mripard@kernel.org>
• COLD57d REVIEWED: 1 (1M) [PATCH v4 6/8] dma-buf: heaps: Export mem_accounting parameter
  2026-03-31 · Maxime Ripard <mripard@kernel.org>
• COLD57d LANDED [PATCH v4 1/8] dma: contiguous: Turn heap registration logic around
  2026-03-31 · Maxime Ripard <mripard@kernel.org>
• STALE74d [PATCH v3 12/12] treewide: change inode->i_ino from unsigned long to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>
• STALE63d REVIEWED: 1 (1M) [PATCH v3 8/8] dma-buf: heaps: system: Turn the heap into a module
  2026-03-03 · Maxime Ripard <mripard@kernel.org>
• STALE63d REVIEWED: 1 (1M) [PATCH v3 7/8] dma-buf: heaps: cma: Turn the heap into a module
  2026-03-03 · Maxime Ripard <mripard@kernel.org>
• STALE63d REVIEWED: 1 (1M) [PATCH v3 6/8] dma-buf: heaps: Export mem_accounting parameter
  2026-03-03 · Maxime Ripard <mripard@kernel.org>
• STALE63d REVIEWED: 2 (1M) [PATCH v3 1/8] dma: contiguous: Turn heap registration logic around
  2026-03-03 · Maxime Ripard <mripard@kernel.org>
• STALE86d [PATCH v2 107/110] dma-buf: replace PRIino with %llu/%llx format strings
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE86d [PATCH v2 054/110] dma-buf: use PRIino format for i_ino
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE87d REVIEWED: 1 (1M) [PATCH v2 9/9] dma-buf: heaps: system: Turn the heap into a module
  2026-02-27 · Maxime Ripard <mripard@kernel.org>
• STALE87d REVIEWED: 1 (1M) [PATCH v2 8/9] dma-buf: heaps: cma: Turn the heap into a module
  2026-02-27 · Maxime Ripard <mripard@kernel.org>
• STALE87d REVIEWED: 1 (1M) [PATCH v2 7/9] dma-buf: heaps: Export mem_accounting parameter
  2026-02-27 · Maxime Ripard <mripard@kernel.org>
• STALE87d REVIEWED: 1 (1M) [PATCH v2 1/9] dma: contiguous: Turn heap registration logic around
  2026-02-27 · Maxime Ripard <mripard@kernel.org>
• STALE91d [PATCH 56/61] dma-buf: update format string for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE91d [PATCH 7/7] dma-buf: heaps: system: Turn the heap into a module
  2026-02-25 · Maxime Ripard <mripard@kernel.org>
• STALE91d [PATCH 6/7] dma-buf: heaps: cma: Turn the heap into a module
  2026-02-25 · Maxime Ripard <mripard@kernel.org>
• STALE91d [PATCH 5/7] dma-buf: heaps: Export mem_accounting parameter
  2026-02-25 · Maxime Ripard <mripard@kernel.org>
• STALE91d [PATCH 1/7] dma: contiguous: Turn heap registration logic around
  2026-02-25 · Maxime Ripard <mripard@kernel.org>
• STALE88d [PATCH v2 3/3] dma-buf: heaps: cma: charge each cma heap's dmem
  2026-02-18 · Eric Chanudet <hidden>
• COLD23d [PATCH v2 06/10] dma-buf: heaps: Add support for Tegra VPR
  2026-01-22 · Thierry Reding <thierry.reding@kernel.org>
• COLD23d [PATCH v2 05/10] dma-buf: heaps: Add debugfs support
  2026-01-22 · Thierry Reding <thierry.reding@kernel.org>
• COLD23d [PATCH v2 04/10] mm/cma: Allow dynamically creating CMA areas
  2026-01-22 · Thierry Reding <thierry.reding@kernel.org>
• COOLING6d [PATCH v18 28/42] dept: assign unique dept_key to each distinct dma fence caller
  2025-12-05 · Byungchul Park <byungchul@sk.com>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE87d REVIEWED: 1 (1M) [PATCH v2 1/9] dma: contiguous: Turn heap registration logic around
  2026-02-27 · Maxime Ripard <mripard@kernel.org> · 1 Reviewed-by
• STALE63d REVIEWED: 2 (1M) [PATCH v3 1/8] dma: contiguous: Turn heap registration logic around
  2026-03-03 · Maxime Ripard <mripard@kernel.org> · 2 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE163d [PATCH v6 06/11] dma-buf: provide phys_vec to scatter-gather mapping routine
  2025-11-02 · Leon Romanovsky <leon@kernel.org>
• COOLING6d [PATCH v18 14/42] dept: apply sdt_might_sleep_{start,end}() to dma fence
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• COOLING6d [PATCH v18 28/42] dept: assign unique dept_key to each distinct dma fence caller
  2025-12-05 · Byungchul Park <byungchul@sk.com>
• COLD23d [PATCH v2 05/10] dma-buf: heaps: Add debugfs support
  2026-01-22 · Thierry Reding <thierry.reding@kernel.org>
• STALE91d [PATCH 56/61] dma-buf: update format string for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE86d [PATCH v2 054/110] dma-buf: use PRIino format for i_ino
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE86d [PATCH v2 107/110] dma-buf: replace PRIino with %llu/%llx format strings
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• COLD57d LANDED [PATCH v4 1/8] dma: contiguous: Turn heap registration logic around
  2026-03-31 · Maxime Ripard <mripard@kernel.org>