On Tue, Mar 01, 2016 at 11:56:22AM -0800, Linus Torvalds wrote: > (a) special-case the PF_EXITING case for usefaultfd, something like > > diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c > index 50311703135b..66cdb44616d5 100644 > --- a/fs/userfaultfd.c > +++ b/fs/userfaultfd.c > @@ -287,6 +287,12 @@ int handle_userfault(struct vm_area_struct > *vma, unsigned long address, > goto out; > > /* > + * We don't do userfault handling for the final child pid update. > + */ > + if (current->flags & PF_EXITING) > + goto out;
Umm... Probably a dumb question, but would that suffice when e.g. another thread is just starting to dump core?
