From: Rob Clark <robdclark@xxxxxxxxxxxx> This is mostly motivated by getting drm/msm to pass an i-g-t shrinker test that I've been working on. In particular the test creates and cycles between more GEM buffers than what will fit in RAM to force eviction and re-pin. (There are sub-tests that cover this case both single threaded and with many child processes in parallel.) Getting this test to pass necessitated a few improvements: 1. Re-ordering submit path to get rid of __GFP_NORETRY (in the common case, doing this for syncobjs is still TODO) 2. Decoupling locks needed in the retire path from locks that could be held while hitting reclaim in the submit path 3. If necessary, allow stalling on active BOs for reclaim. The latter point is because we pin objects in the synchronous part of the submit path (before queuing on the drm gpu-scheduler), which means in the parallel variant of the i-g-t test, we need to be able to block in the reclaim path until some queued work has completed/retired. In the process of re-working how drm/msm tracks buffer state in it's various LRU lists, I refactored out a drm_gem_lru helper which, in theory, should be usable by other drivers and drm shmem helpers for implementing LRU tracking and shrinker. Rob Clark (15): drm/msm: Switch to pfn mappings drm/msm: Make enable_eviction flag static drm/msm: Reorder lock vs submit alloc drm/msm: Small submit cleanup drm/msm: Split out idr_lock drm/msm/gem: Check for active in shrinker path drm/msm/gem: Rename update_inactive drm/msm/gem: Rename to pin/unpin_pages drm/msm/gem: Consolidate pin/unpin paths drm/msm/gem: Remove active refcnt drm/gem: Add LRU/shrinker helper drm/msm/gem: Convert to using drm_gem_lru drm/msm/gem: Unpin buffers earlier drm/msm/gem: Consolidate shrinker trace drm/msm/gem: Evict active GEM objects when necessary drivers/gpu/drm/drm_gem.c | 183 +++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_drv.c | 18 ++- drivers/gpu/drm/msm/msm_drv.h | 70 +++++++--- drivers/gpu/drm/msm/msm_gem.c | 154 +++++++-------------- drivers/gpu/drm/msm/msm_gem.h | 112 +-------------- drivers/gpu/drm/msm/msm_gem_prime.c | 4 +- drivers/gpu/drm/msm/msm_gem_shrinker.c | 164 ++++++++++------------ drivers/gpu/drm/msm/msm_gem_submit.c | 78 ++++------- drivers/gpu/drm/msm/msm_gpu.c | 3 - drivers/gpu/drm/msm/msm_gpu.h | 10 +- drivers/gpu/drm/msm/msm_gpu_trace.h | 36 +++-- drivers/gpu/drm/msm/msm_submitqueue.c | 1 + include/drm/drm_gem.h | 56 ++++++++ 13 files changed, 485 insertions(+), 404 deletions(-) -- 2.36.1
