On Mon 01-02-16 16:26:08, Kirill A. Shutemov wrote: > We don't care if there's a tail pages which is not on LRU. We are not > going to isolate them anyway.
yes we are not going to isolate them but calling this function on a tail page is wrong in principle, no? PageLRU check is racy outside of lru_lock so what if we are racing here. I know, highly unlikely but not impossible. So I am not really sure this is an improvement. When would we hit this VM_BUG_ON and it wouldn't be a bug or at least suspicious usage? -- Michal Hocko SUSE Labs
