This series implements TTM shrinker / eviction helpers and an xe bo shrinker. It builds on two previous series, *and obsoletes these*. First https://www.mail-archive.com/dri-devel@xxxxxxxxxxxxxxxxxxxxx/msg484425.html for patch 1-4, which IMO still could be reviewed and pushed as a separate series. Second the previous TTM shrinker series https://lore.kernel.org/linux-mm/b7491378-defd-4f1c-31e2-29e4c77e2d67@xxxxxxx/T/ Where the comment about layering https://lore.kernel.org/linux-mm/b7491378-defd-4f1c-31e2-29e4c77e2d67@xxxxxxx/T/#ma918844aa8a6efe8768fdcda0c6590d5c93850c9 now addressed, and this version also implements shmem objects for backup rather than direct swap-cache insertions, which was used in the previuos series. It turns out that with per-page backup / shrinking, shmem objects appears to work just as well as direct swap-cache insertions with the added benefit that was introduced in the previous TTM shrinker series to avoid running out of swap entries isn't really needed. In any case, patch 1-4 are better described in their separate series. (RFC is removed for those). Patch 5 could in theory be skipped but introduces a possibility to easily add or test multiple backup backends, like the direct swap-cache insertion or even files into fast dedicated nvme storage for for example. Patch 6 introduces helpers in the ttm_pool code for page-by-page shrinking and recovery. It avoids having to temporarily allocate a huge amount of memory to be able to shrink a buffer object. It also introduces the possibility to immediately write-back pages if needed, since that tends to be a bit delayed when left to kswapd. Patch 7 Adds a simple error injection to the above code to help increase test coverage. Patch 8 introduces a LRU walk helper for eviction and shrinking. It's currently xe-only but not xe-specific and can easily be moved to TTM when used by more than one driver or when eviction is implemented using it. Patch 9 introduces a helper callback for shrinking (Also ready to be moved to TTM) and an xe-specific shrinker implementation. It also adds a kunit test to test the shrinker functionality by trying to allocate twice the available amount of RAM as buffer objects. If there is no swap-space available, the buffer objects are marked purgeable. v2: - Squash obsolete revision history in the patch commit messages. - Fix a couple of review comments by Christian - Don't store the mem_type in the TTM managers but in the resource cursor. - Rename introduced TTM *back_up* function names to *backup* - Add ttm pool recovery fault injection. - Shrinker xe kunit test - Various bugfixes Cc: Somalapuram Amaranath <Amaranath.Somalapuram@xxxxxxx> Cc: Christian König <christian.koenig@xxxxxxx> Cc: <dri-devel@xxxxxxxxxxxxxxxxxxxxx> Thomas Hellström (8): drm/ttm: Allow TTM LRU list nodes of different types drm/ttm: Use LRU hitches drm/ttm, drm/amdgpu, drm/xe: Consider hitch moves within bulk sublist moves drm/ttm: Allow continued swapout after -ENOSPC falure drm/ttm: Add a virtual base class for graphics memory backup drm/ttm/pool: Provide a helper to shrink pages. drm/xe, drm/ttm: Provide a generic LRU walker helper drm/xe: Add a shrinker for xe bos drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 4 + drivers/gpu/drm/ttm/Makefile | 2 +- drivers/gpu/drm/ttm/ttm_backup_shmem.c | 137 +++++++++ drivers/gpu/drm/ttm/ttm_bo.c | 1 + drivers/gpu/drm/ttm/ttm_device.c | 33 ++- drivers/gpu/drm/ttm/ttm_pool.c | 391 ++++++++++++++++++++++++- drivers/gpu/drm/ttm/ttm_resource.c | 231 ++++++++++++--- drivers/gpu/drm/ttm/ttm_tt.c | 34 +++ drivers/gpu/drm/xe/Makefile | 2 + drivers/gpu/drm/xe/xe_bo.c | 123 ++++++-- drivers/gpu/drm/xe/xe_bo.h | 3 + drivers/gpu/drm/xe/xe_device.c | 8 + drivers/gpu/drm/xe/xe_device_types.h | 2 + drivers/gpu/drm/xe/xe_shrinker.c | 237 +++++++++++++++ drivers/gpu/drm/xe/xe_shrinker.h | 18 ++ drivers/gpu/drm/xe/xe_ttm_helpers.c | 224 ++++++++++++++ drivers/gpu/drm/xe/xe_ttm_helpers.h | 63 ++++ drivers/gpu/drm/xe/xe_vm.c | 4 + include/drm/ttm/ttm_backup.h | 136 +++++++++ include/drm/ttm/ttm_device.h | 2 + include/drm/ttm/ttm_pool.h | 4 + include/drm/ttm/ttm_resource.h | 96 +++++- include/drm/ttm/ttm_tt.h | 19 ++ 23 files changed, 1683 insertions(+), 91 deletions(-) create mode 100644 drivers/gpu/drm/ttm/ttm_backup_shmem.c create mode 100644 drivers/gpu/drm/xe/xe_shrinker.c create mode 100644 drivers/gpu/drm/xe/xe_shrinker.h create mode 100644 drivers/gpu/drm/xe/xe_ttm_helpers.c create mode 100644 drivers/gpu/drm/xe/xe_ttm_helpers.h create mode 100644 include/drm/ttm/ttm_backup.h -- 2.44.0 Thomas Hellström (9): drm/ttm: Allow TTM LRU list nodes of different types drm/ttm: Use LRU hitches drm/ttm, drm/amdgpu, drm/xe: Consider hitch moves within bulk sublist moves drm/ttm: Allow continued swapout after -ENOSPC falure drm/ttm: Add a virtual base class for graphics memory backup drm/ttm/pool: Provide a helper to shrink pages. drm/ttm: Use fault-injection to test error paths drm/xe, drm/ttm: Provide a generic LRU walker helper drm/xe: Add a shrinker for xe bos drivers/gpu/drm/Kconfig | 10 + drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 4 + drivers/gpu/drm/ttm/Makefile | 2 +- drivers/gpu/drm/ttm/ttm_backup_shmem.c | 137 ++++++++ drivers/gpu/drm/ttm/ttm_bo.c | 1 + drivers/gpu/drm/ttm/ttm_device.c | 33 +- drivers/gpu/drm/ttm/ttm_pool.c | 412 ++++++++++++++++++++++++- drivers/gpu/drm/ttm/ttm_resource.c | 229 +++++++++++--- drivers/gpu/drm/ttm/ttm_tt.c | 37 +++ drivers/gpu/drm/xe/Makefile | 2 + drivers/gpu/drm/xe/tests/xe_bo.c | 118 +++++++ drivers/gpu/drm/xe/tests/xe_bo_test.c | 1 + drivers/gpu/drm/xe/tests/xe_bo_test.h | 1 + drivers/gpu/drm/xe/xe_bo.c | 145 ++++++++- drivers/gpu/drm/xe/xe_bo.h | 4 + drivers/gpu/drm/xe/xe_device.c | 8 + drivers/gpu/drm/xe/xe_device_types.h | 2 + drivers/gpu/drm/xe/xe_shrinker.c | 226 ++++++++++++++ drivers/gpu/drm/xe/xe_shrinker.h | 18 ++ drivers/gpu/drm/xe/xe_ttm_helpers.c | 224 ++++++++++++++ drivers/gpu/drm/xe/xe_ttm_helpers.h | 50 +++ drivers/gpu/drm/xe/xe_vm.c | 4 + include/drm/ttm/ttm_backup.h | 136 ++++++++ include/drm/ttm/ttm_pool.h | 5 + include/drm/ttm/ttm_resource.h | 99 +++++- include/drm/ttm/ttm_tt.h | 20 ++ 26 files changed, 1839 insertions(+), 89 deletions(-) create mode 100644 drivers/gpu/drm/ttm/ttm_backup_shmem.c create mode 100644 drivers/gpu/drm/xe/xe_shrinker.c create mode 100644 drivers/gpu/drm/xe/xe_shrinker.h create mode 100644 drivers/gpu/drm/xe/xe_ttm_helpers.c create mode 100644 drivers/gpu/drm/xe/xe_ttm_helpers.h create mode 100644 include/drm/ttm/ttm_backup.h -- 2.44.0
