On Sun, Oct 4, 2020 at 9:21 PM Rob Clark robdclark@gmail.com wrote:
From: Rob Clark robdclark@chromium.org
This doesn't remove *all* the struct_mutex, but it covers the worst of it, ie. shrinker/madvise/free/retire. The submit path still uses struct_mutex, but it still needs *something* serialize a portion of the submit path, and lock_stat mostly just shows the lock contention there being with other submits. And there are a few other bits of struct_mutex usage in less critical paths (debugfs, etc). But this seems like a reasonable step in the right direction.
What a great patch set. Daniel has some good points and nothing that requires big changes, but on the other hand, I'm not sure it's something that needs to block this set either.
Either way, for the series
Reviewed-by: Kristian H. Kristensen hoegsberg@google.com
Rob Clark (14): drm/msm: Use correct drm_gem_object_put() in fail case drm/msm: Drop chatty trace drm/msm: Move update_fences() drm/msm: Add priv->mm_lock to protect active/inactive lists drm/msm: Document and rename preempt_lock drm/msm: Protect ring->submits with it's own lock drm/msm: Refcount submits drm/msm: Remove obj->gpu drm/msm: Drop struct_mutex from the retire path drm/msm: Drop struct_mutex in free_object() path drm/msm: remove msm_gem_free_work drm/msm: drop struct_mutex in madvise path drm/msm: Drop struct_mutex in shrinker path drm/msm: Don't implicit-sync if only a single ring
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 4 +- drivers/gpu/drm/msm/adreno/a5xx_preempt.c | 12 +-- drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 +- drivers/gpu/drm/msm/msm_debugfs.c | 7 ++ drivers/gpu/drm/msm/msm_drv.c | 15 +--- drivers/gpu/drm/msm/msm_drv.h | 19 +++-- drivers/gpu/drm/msm/msm_gem.c | 76 ++++++------------ drivers/gpu/drm/msm/msm_gem.h | 53 +++++++++---- drivers/gpu/drm/msm/msm_gem_shrinker.c | 58 ++------------ drivers/gpu/drm/msm/msm_gem_submit.c | 17 ++-- drivers/gpu/drm/msm/msm_gpu.c | 96 ++++++++++++++--------- drivers/gpu/drm/msm/msm_gpu.h | 5 +- drivers/gpu/drm/msm/msm_ringbuffer.c | 3 +- drivers/gpu/drm/msm/msm_ringbuffer.h | 13 ++- 14 files changed, 188 insertions(+), 194 deletions(-)
-- 2.26.2
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