On 2014/2/14 2:29, Tejun Heo wrote: > Currently, there's nothing preventing cgroup_enable_task_cg_lists() > from missing set PF_EXITING and race against cgroup_exit(). Depending > on the timing, cgroup_exit() may finish with the task still linked on > css_set leading to list corruption. Fix it by grabbing siglock in > cgroup_enable_task_cg_lists() so that PF_EXITING is guaranteed to be > visible. > > This whole on-demand cg_list optimization is extremely fragile and has > ample possibility to lead to bugs which can cause things like > once-a-year oops during boot. I'm wondering whether the better > approach would be just adding "cgroup_disable=all" handling which > disables the whole cgroup rather than tempting fate with this > on-demand craziness. > > Signed-off-by: Tejun Heo <t...@kernel.org> > Cc: sta...@vger.kernel.org
Acked-by: Li Zefan <lize...@huawei.com> -- 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/
