> On Jul 31, 2019, at 9:16 AM, Oleg Nesterov <oleg@xxxxxxxxxx> wrote: > > On 07/28, Song Liu wrote: >> >> @@ -525,6 +527,9 @@ int uprobe_write_opcode(struct arch_uprobe *auprobe, struct mm_struct *mm, >> >> /* dec_mm_counter for old_page */ >> dec_mm_counter(mm, MM_ANONPAGES); >> + >> + if (PageCompound(orig_page)) >> + orig_page_huge = true; > > I am wondering how find_get_page() can return a PageCompound() page... > > IIUC, this is only possible if shmem_file(), right? Yes, this is the case at the moment. We will be able to do it for other file systems when this set gets in: https://lkml.org/lkml/2019/6/24/1531 Thanks, Song
