/dxgkrnl_linux

Primary LanguageC++

reproduce steps

1, submit copy commands which copy 0xdeadbeefdeadbeef from src_gpu_va to dst_gpu_va
2, fork a child process
3, trigger copy-on-write from parent process on dst_gpu_va page

get_user_pages_fast

child: tgid = 26, pid = 26, dst_cpu = deadbeefdeadbeef
parent: tgid = 25, pid = 25, dst_cpu = 0000000000000000

pin_user_pages_fast

child: tgid = 8129, pid = 8129, dst_cpu = 0000000000000000
parent: tgid = 8128, pid = 8128, dst_cpu = deadbeefdeadbeef

note

Please use AMD gfx9 GPU and above with Hardware Accelerated GPU Scheduling disabled.