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selftests/vm: update hugetlb madvise

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Commit 8ebe0a5eaa ("mm,madvise,hugetlb: fix unexpected data loss with
MADV_DONTNEED on hugetlbfs") changed how the passed length was interpreted
for hugetlb mappings.  It was changed from align up to align down.  The
hugetlb-madvise test explicitly tests this behavior.  Change test to
expect new behavior.

Link: https://lkml.kernel.org/r/20221104011632.357049-1-mike.kravetz@oracle.com
Link: https://lore.kernel.org/oe-lkp/202211040619.2ec447d7-oliver.sang@intel.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Rik van Riel <riel@surriel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mike Kravetz 2022-11-03 18:16:32 -07:00 committed by Andrew Morton
parent 65917b538b
commit 634ba645f9
1 changed files with 4 additions and 3 deletions
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7
tools/testing/selftests/vm/hugetlb-madvise.c
View file

@ -195,7 +195,7 @@ int main(int argc, char **argv)
exit(1);
}
/* addr + length should be aligned up to huge page size */
/* addr + length should be aligned down to huge page size */
if (madvise(addr,
((NR_HUGE_PAGES - 1) * huge_page_size) + base_page_size,
MADV_DONTNEED)) {
@ -203,10 +203,11 @@ int main(int argc, char **argv)
exit(1);
}
/* should free all pages in mapping */
validate_free_pages(free_hugepages);
/* should free all but last page in mapping */
validate_free_pages(free_hugepages - 1);
(void)munmap(addr, NR_HUGE_PAGES * huge_page_size);
validate_free_pages(free_hugepages);
/*
* Test MADV_DONTNEED on anonymous private mapping