On Sun 16-12-18 19:51:57, Matthew Wilcox wrote: [...] > Ah, yes, that makes perfect sense. Thank you for the explanation. > > I wonder if the correct fix, however, is not to move the check for > GFP_NOFS in out_of_memory() down to below the check whether to kill > the current task. That would solve your problem, and I don't _think_ > it would cause any new ones. Michal, you touched this code last, what > do you think?
What do you mean exactly? Whether we kill a current task or something else doesn't change much on the fact that NOFS is a reclaim restricted context and we might kill too early. If the fs can do GFP_FS then it is obviously a better thing to do because FS metadata can be reclaimed as well and therefore there is potentially less memory pressure on application data. -- Michal Hocko SUSE Labs
