From: Mike Rapoport Date: Fri, 24 Feb 2017 22:56:08 +0000 (-0800) Subject: userfaultfd: non-cooperative: selftest: enable REMOVE event test for shmem X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=64527f5d540ad496718c7bca5e9387cf6cf94e8c;p=openwrt%2Fstaging%2Fblogic.git 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: Mike Rapoport Reviewed-by: Andrea Arcangeli Cc: Hillf Danton Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 9eb77df568f7..e9449c801888 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -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 */