On Thu 22-08-19 13:07:17, Yizhuo Zhai wrote: > This will happen if variable "wb->memcg_css" is NULL. This case is reported > by our analysis tool. Does your tool report the particular call path and conditions when that happen? Or is it just a "it mignt happen" kinda thing? > Since the function mem_cgroup_wb_domain() is visible to the global, we > cannot control caller's behavior. I am sorry but I do not understand what is this supposed to mean. -- Michal Hocko SUSE Labs