Messages in this thread | | | Date | Thu, 30 Aug 2012 02:17:39 -0700 | From | Tejun Heo <> | Subject | Re: [PATCH 4/9 V3] workqueue: add non_manager_role_manager_mutex_unlock() |
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Hello, Lai.
On Thu, Aug 30, 2012 at 05:16:01PM +0800, Lai Jiangshan wrote: > gcwq_unbind_fn() is unsafe even it is called from a work item. > so we need non_manager_role_manager_mutex_unlock(). > > If rebind_workers() is called from a work item, it is safe when there is > no CPU_INTENSIVE items. but we can't disable CPU_INTENSIVE items, > so it is still unsafe, we need non_manager_role_manager_mutex_unlock() too.
Can you please elaborate? Why is it not safe if there are CPU_INTENSIVE items?
Thanks.
-- tejun
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