> > the lru_lock of struct mem_group_per_zone is used to avoid preemption > > during the __mem_cgroup_stat_add_safe function. > > therefore, a raw_spinlock_t should be used. > > What is the reason that this must avoid preemption? it guards a call to smp_processor_id() in __mem_cgroup_stat_add_safe(). see http://article.gmane.org/gmane.linux.rt.user/3690 > Is there another > way to solve this? I rather not just add a raw spinlock if we can > help it. not sure, maybe one can disable preemption for that specific function? tim -- tim@xxxxxxxxxx http://tim.klingt.org Art is either a complaint or do something else John Cage quoting Jasper Johns
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