Mike Kravetz f1f5d089fc selftests/memfd: clean up mapping in mfd_fail_write ... [ Upstream commit fda153c89a ] Running the memfd script ./run_hugetlbfs_test.sh will often end in error as follows: memfd-hugetlb: CREATE memfd-hugetlb: BASIC memfd-hugetlb: SEAL-WRITE memfd-hugetlb: SEAL-FUTURE-WRITE memfd-hugetlb: SEAL-SHRINK fallocate(ALLOC) failed: No space left on device ./run_hugetlbfs_test.sh: line 60: 166855 Aborted (core dumped) ./memfd_test hugetlbfs opening: ./mnt/memfd fuse: DONE If no hugetlb pages have been preallocated, run_hugetlbfs_test.sh will allocate 'just enough' pages to run the test. In the SEAL-FUTURE-WRITE test the mfd_fail_write routine maps the file, but does not unmap. As a result, two hugetlb pages remain reserved for the mapping. When the fallocate call in the SEAL-SHRINK test attempts allocate all hugetlb pages, it is short by the two reserved pages. Fix by making sure to unmap in mfd_fail_write. Link: https://lkml.kernel.org/r/20220219004340.56478-1-mike.kravetz@oracle.com Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-03-16 14:16:01 +01:00
..
fault-injection
ktest	tweewide: Fix most Shebang lines	2021-05-22 11:40:55 +02:00
kunit	tweewide: Fix most Shebang lines	2021-05-22 11:40:55 +02:00
nvdimm	device-dax: add dis-contiguous resource support	2020-10-13 18:38:28 -07:00
radix-tree	idr test suite: Create anchor before launching throbber	2021-04-16 11:43:21 +02:00
scatterlist	tools/testing/scatterlist: Fix test to compile and run	2020-11-17 20:02:20 -04:00
selftests	selftests/memfd: clean up mapping in mfd_fail_write	2022-03-16 14:16:01 +01:00
vsock