Am 10.07.24 um 15:57 schrieb Lei Liu:

Use vm_insert_page to establish a mapping for the memory allocated by dmabuf, thus supporting direct I/O read and write; and fix the issue of incorrect memory statistics after mapping dmabuf memory.

Well big NAK to that! Direct I/O is intentionally disabled on DMA-bufs.

We already discussed enforcing that in the DMA-buf framework and this patch probably means that we should really do that.

Regards, Christian.

Lei Liu (2): mm: dmabuf_direct_io: Support direct_io for memory allocated by dmabuf mm: dmabuf_direct_io: Fix memory statistics error for dmabuf allocated memory with direct_io support

drivers/dma-buf/heaps/system_heap.c | 5 +++-- fs/proc/task_mmu.c | 8 +++++++- include/linux/mm.h | 1 + mm/memory.c | 15 ++++++++++----- mm/rmap.c | 9 +++++---- 5 files changed, 26 insertions(+), 12 deletions(-)