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425a783e1b
Add ttm_bo_evict_cgroup() to evict buffer objects charged to a specific dmem cgroup pool from a resource manager's LRU until a byte target is met. Add ttm_resource_manager_set_dmem_region() to associate a dmem cgroup region with a resource manager; drivers supply their own dmem_cgroup_ops with ttm_resource_manager_dmem_reclaim as the reclaim function and the manager pointer as reclaim_priv in the dmem_cgroup_init to wire up TTM eviction as the reclaim callback. The eviction context is interruptible; signals abort the operation and propagate back through the write() syscall. Introduce a new mode for the bo LRU walker so that sleeping locks can be taken. This can be used when the caller doesn't hold any previous dma_resv locks, and where it intends to hold at most one lock at a time. Like the rest of the TTM eviction this should sooner than later be converted to full WW transactions. v3: - Fix ttm_resource_manager_set_dmem_region() storing an error pointer in man->cg unconditionally. (Sashiko-bot) - Fix kernel-doc function name format for ttm_bo_evict_cgroup() and ttm_resource_manager_set_dmem_region(). v5: - Rebased on the introduction of struct dmem_cgroup_init. - Handle NULL region in ttm_resource_manager_set_dmem_region() to clear the reclaim callback, preventing use-after-free when the manager is torn down while the dmem region outlives it. (Sashiko-bot) - Return 0 on any progress (even partial eviction), -ENOSPC only when nothing was freed; fixes callers that expected 0 on partial success. - Document that the reclaim callback should return 0 if some progress was made, -ENOSPC if no progress at all, or another error for fatal failures. v8: - Fix ttm_resource_manager_set_dmem_region() using IS_ERR_OR_NULL(), which skipped the assignment for a NULL region and thus never cleared man->cg. Use IS_ERR() so that a NULL region detaches the region as the kernel-doc and the v5 changelog intended. (Sashiko-bot) v9: - Don't leak cgroup charges for bos that may have survived dmemcg region fini. - Drop the misleading "Capture size before eviction in case res is cleared" comment in ttm_bo_evict_cb(). (Maarten Lankhorst) Assisted-by: GitHub_Copilot:claude-sonnet-4.6 Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> #v7 Tested-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com> Link: https://patch.msgid.link/20260725100036.2372-5-thomas.hellstrom@linux.intel.com Signed-off-by: Maarten Lankhorst <dev@lankhorst.se> |
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| .. | ||
| amd | ||
| bridge | ||
| clients | ||
| display | ||
| intel | ||
| ttm | ||
| amd_asic_type.h | ||
| drm_accel.h | ||
| drm_atomic_helper.h | ||
| drm_atomic_state_helper.h | ||
| drm_atomic_uapi.h | ||
| drm_atomic.h | ||
| drm_audio_component.h | ||
| drm_auth.h | ||
| drm_blend.h | ||
| drm_bridge_connector.h | ||
| drm_bridge_helper.h | ||
| drm_bridge.h | ||
| drm_buddy.h | ||
| drm_cache.h | ||
| drm_client_event.h | ||
| drm_client.h | ||
| drm_color_mgmt.h | ||
| drm_colorop.h | ||
| drm_connector.h | ||
| drm_crtc_helper.h | ||
| drm_crtc.h | ||
| drm_damage_helper.h | ||
| drm_debugfs_crc.h | ||
| drm_debugfs.h | ||
| drm_device.h | ||
| drm_drv.h | ||
| drm_dumb_buffers.h | ||
| drm_edid.h | ||
| drm_eld.h | ||
| drm_encoder.h | ||
| drm_exec.h | ||
| drm_fb_dma_helper.h | ||
| drm_fb_helper.h | ||
| drm_fbdev_dma.h | ||
| drm_fbdev_shmem.h | ||
| drm_fbdev_ttm.h | ||
| drm_file.h | ||
| drm_fixed.h | ||
| drm_flip_work.h | ||
| drm_format_helper.h | ||
| drm_fourcc.h | ||
| drm_framebuffer.h | ||
| drm_gem_atomic_helper.h | ||
| drm_gem_dma_helper.h | ||
| drm_gem_framebuffer_helper.h | ||
| drm_gem_shmem_helper.h | ||
| drm_gem_ttm_helper.h | ||
| drm_gem_vram_helper.h | ||
| drm_gem.h | ||
| drm_gpusvm.h | ||
| drm_gpuvm.h | ||
| drm_ioctl.h | ||
| drm_kunit_helpers.h | ||
| drm_lease.h | ||
| drm_managed.h | ||
| drm_mipi_dbi.h | ||
| drm_mipi_dsi.h | ||
| drm_mm.h | ||
| drm_mode_config.h | ||
| drm_mode_object.h | ||
| drm_modes.h | ||
| drm_modeset_helper_vtables.h | ||
| drm_modeset_helper.h | ||
| drm_modeset_lock.h | ||
| drm_module.h | ||
| drm_of.h | ||
| drm_pagemap_util.h | ||
| drm_pagemap.h | ||
| drm_panel.h | ||
| drm_panic.h | ||
| drm_pciids.h | ||
| drm_plane_helper.h | ||
| drm_plane.h | ||
| drm_prime.h | ||
| drm_print.h | ||
| drm_privacy_screen_consumer.h | ||
| drm_privacy_screen_driver.h | ||
| drm_privacy_screen_machine.h | ||
| drm_probe_helper.h | ||
| drm_property.h | ||
| drm_ras_genl_family.h | ||
| drm_ras.h | ||
| drm_rect.h | ||
| drm_self_refresh_helper.h | ||
| drm_simple_kms_helper.h | ||
| drm_suballoc.h | ||
| drm_syncobj.h | ||
| drm_sysfs.h | ||
| drm_util.h | ||
| drm_utils.h | ||
| drm_vblank_helper.h | ||
| drm_vblank_work.h | ||
| drm_vblank.h | ||
| drm_vma_manager.h | ||
| drm_writeback.h | ||
| gpu_scheduler.h | ||
| gud.h | ||
| Makefile | ||
| spsc_queue.h | ||
| task_barrier.h | ||