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Commit 64527f5d authored by Mike Rapoport's avatar Mike Rapoport Committed by Linus Torvalds
Browse files

userfaultfd: non-cooperative: selftest: enable REMOVE event test for shmem 

Now when madvise(MADV_REMOVE) notifies uffd reader, we should verify
that appliciation actually sees zeros at the removed range.

Link: http://lkml.kernel.org/r/1484814154-1557-4-git-send-email-rppt@linux.vnet.ibm.com


Signed-off-by: default avatarMike Rapoport <rppt@linux.vnet.ibm.com>
Reviewed-by: default avatarAndrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a6bf53eb

tools/testing/selftests/vm/userfaultfd.c

+2 −4
Original line number Diff line number Diff line
@@ -569,9 +569,9 @@ static int userfaultfd_open(int features) 
 * part is accessed after mremap. Since hugetlbfs does not support

 * mremap, the entire monitored area is accessed in a single pass for

 * HUGETLB_TEST.

 * The release of the pages currently generates event only for

 * The release of the pages currently generates event for shmem and

 * anonymous memory (UFFD_EVENT_REMOVE), hence it is not checked

 * for hugetlb and shmem.

 * for hugetlb.

 */

static int faulting_process(void)

{
@@ -610,7 +610,6 @@ static int faulting_process(void) 
		}

	}



#ifndef SHMEM_TEST

	if (release_pages(area_dst))

		return 1;
@@ -618,7 +617,6 @@ static int faulting_process(void) 
		if (my_bcmp(area_dst + nr * page_size, zeropage, page_size))

			fprintf(stderr, "nr %lu is not zero\n", nr), exit(1);

	}

#endif /* SHMEM_TEST */



#endif /* HUGETLB_TEST */