(adding Michal) On Mon, Aug 07, 2017 at 04:12:25PM +0300, Mike Rapoport wrote: > When the process exit races with outstanding mcopy_atomic, it would be > better to return ESRCH error. When such race occurs the process and it's mm > are going away and returning "no such process" to the uffd monitor seems > better fit than ENOSPC. > > Suggested-by: Michal Hocko <[email protected]> > Cc: Andrea Arcangeli <[email protected]> > Cc: "Dr. David Alan Gilbert" <[email protected]> > Cc: Pavel Emelyanov <[email protected]> > Cc: Mike Kravetz <[email protected]> > Signed-off-by: Mike Rapoport <[email protected]> > --- > The man-pages update is ready and I'll send it out once the patch is > merged. > > fs/userfaultfd.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c > index 06ea26b8c996..b0d5897bc4e6 100644 > --- a/fs/userfaultfd.c > +++ b/fs/userfaultfd.c > @@ -1600,7 +1600,7 @@ static int userfaultfd_copy(struct userfaultfd_ctx *ctx, > uffdio_copy.len); > mmput(ctx->mm); > } else { > - return -ENOSPC; > + return -ESRCH; > } > if (unlikely(put_user(ret, &user_uffdio_copy->copy))) > return -EFAULT; > @@ -1647,7 +1647,7 @@ static int userfaultfd_zeropage(struct userfaultfd_ctx > *ctx, > uffdio_zeropage.range.len); > mmput(ctx->mm); > } else { > - return -ENOSPC; > + return -ESRCH; > } > if (unlikely(put_user(ret, &user_uffdio_zeropage->zeropage))) > return -EFAULT; > -- > 2.7.4 >
-- Sincerely yours, Mike.
