On Fri 02-11-18 14:18:59, 禹舟键 wrote: > Hi Michal > The message-id is as below > https://lkml.org/lkml/2018/7/31/148 David said : It's possible that p is NULL when calling dump_header(). In this case we : do not want to print any line concerning a victim because no oom kill has : occurred. This means that we should check for p rather than oc. -- Michal Hocko SUSE Labs