sdma page table

The sdma page table tag covers content related to the System DMA (SDMA) page table update path in the AMDGPU Linux kernel driver. A key topic is CVE-2022-50393, a vulnerability fix that replaced a locked iterator with an unlocked iterator in an SDMA page-table update path. This change affects kernel locking semantics, GPU/CPU synchronization for Shared Virtual Memory (SVM), and how distributions classify device-driver fixes. Discussions include the implications for kernel stability, the AMDGPU driver's SDMA engine, and the broader impact on Linux kernel security and performance. The tag is relevant for developers and IT professionals working with AMD graphics hardware, kernel debugging, or GPU memory management.