From mboxrd@z Thu Jan 1 00:00:00 1970 From: Claude Code Review Bot To: dri-devel-reviews@example.com Subject: Claude review: drm/gem-shmem: Track page accessed/dirty status Date: Wed, 11 Feb 2026 17:04:32 +1000 Message-ID: In-Reply-To: <20260209133241.238813-1-tzimmermann@suse.de> References: <20260209133241.238813-1-tzimmermann@suse.de> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Mailer: Claude Code Patch Reviewer Overall Series Review Subject: drm/gem-shmem: Track page accessed/dirty status Author: Thomas Zimmermann Patches: 13 Reviewed: 2026-02-11T17:04:32.865608 --- This patch series addresses a long-standing gap in the DRM GEM-SHMEM memory management code: proper tracking of page accessed and dirty status for integration with the Linux kernel memory manager. The series demonstrates good development practices with preparatory refactorings (patches 1-4) before implementing the core functionality (patches 5-6). **Strengths:** - Well-structured incremental changes with clear progression - Proper use of folio APIs for modern memory management - Addresses technical debt (unused flags in struct drm_gem_shmem_object) - Includes review feedback incorporation (v3 rewrite for VM_PFNMAP) - Tested with CONFIG_VM=y using bochs driver over several hours **Concerns:** 1. **Limited testing scope**: Only tested with bochs (software renderer), not hardware drivers 2. **Performance impact unclear**: No performance testing mentioned for vmap/vunmap paths 3. **Imagination driver change**: Moving dirty flag from init to free changes behavior in subtle ways that need verification 4. **VM_PFNMAP implications**: The v3 rewrite for VM_PFNMAP is mentioned but reasoning not fully explained in commit messages **Recommendation:** Needs broader hardware driver testing and performance validation before merge. The imagination driver change requires explicit ack from maintainers. --- --- Generated by Claude Code Patch Reviewer