On Wed 31-10-12 13:24:00, Tejun Heo wrote: [...] > local_irq_save/restore() from cgroup_clear_css_refs() are replaced > with local_irq_disable/enable() for simplicity. This is safe as > cgroup_rmdir() is always called with IRQ enabled. Note that this IRQ > switching is necessary to ensure that css_tryget() isn't called from > IRQ context on the same CPU while lower context is between CSS > deactivation and setting CSS_REMOVED as css_tryget() would hang > forever in such cases waiting for CSS to be re-activated or > CSS_REMOVED set. This will go away soon.
Much better. Thanks a lot! -- Michal Hocko SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
