On Tue, Mar 11, 2014 at 1:07 PM, Davidlohr Bueso <davidlohr@xxxxxx> wrote: > On Tue, 2014-03-11 at 15:39 -0400, Sasha Levin wrote: >> I've ended up deleting the log file by mistake, but this bug does seem to be important >> so I'd rather not wait before the same issue is triggered again. >> >> The call chain is: >> >> mlock (mm/mlock.c:745) >> __mm_populate (mm/mlock.c:700) >> __mlock_vma_pages_range (mm/mlock.c:229) >> VM_BUG_ON(!rwsem_is_locked(&mm->mmap_sem)); > > So __mm_populate() is only called by mlock(2) and this VM_BUG_ON seems > wrong as we call it without the lock held: Not related to the bug, but please note that __mm_populate() is public and has other call sites outside of mlock.c - namely, it is called during mmap with MAP_POPULATE. -- Michel "Walken" Lespinasse A program is never fully debugged until the last user dies. -- 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>