Messages in this thread |  | | From | "J. R. Okajima" <> | Subject | Q. drm/i915 shrinker, synchronize_rcu_expedited() from handlers | Date | Sun, 30 Apr 2017 15:07:58 +0900 |
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Hello,
Since v4.11-rc7 I can see the workqueue stops on my development/test system. Git-bisecting tells me the suspicious commit is c053b5a 2017-04-11 drm/i915: Don't call synchronize_rcu_expedited under struct_mutex
I am not sure whether this is the real cause or not of my problem, but I have a question. By the commit, the shrinker handlers ->scan_objects() and ->count_objects() both calls synchronize_rcu_expedited() unconditionally. Is it a legal RCU bahavour?
I know dev->struct_mutex is unlocked now, but before the commit, these two handlers were not calling synchronize_rcu_expedited().
J. R. Okajima
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