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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>