tjh.dev / kernel
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drm/msm: Reduce fallout of fence signaling vs reclaim hangs

Until various PM devfreq/QoS and interconnect patches land, we could
potentially trigger reclaim from gpu scheduler thread, and under enough
memory pressure that could trigger a sort of deadlock. Eventually the
wait will timeout and we'll move on to consider other GEM objects. But
given that there is still a potential for deadlock/stalling, we should
reduce the timeout to contain the damage.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/568031/

Rob Clark 4bea53b9 548b61a8

+1 -1
+1 -1
drivers/gpu/drm/msm/msm_gem_shrinker.c
··· 75 75 wait_for_idle(struct drm_gem_object *obj) 76 76 { 77 77 enum dma_resv_usage usage = dma_resv_usage_rw(true); 78 - return dma_resv_wait_timeout(obj->resv, usage, false, 1000) > 0; 78 + return dma_resv_wait_timeout(obj->resv, usage, false, 10) > 0; 79 79 } 80 80 81 81 static bool