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| author | Mike Kravetz <mike.kravetz@oracle.com> | 2017-02-23 02:43:07 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-23 03:41:28 +0300 |
| commit | 9903bd7b73ef0dec429e951009b36643eb0fe239 (patch) | |
| tree | 69bc311c09890f105b321b1bafda32db8b147b7c /fs/userfaultfd.c | |
| parent | cab350afcbc9c8a744e0d164d1c26560568f770b (diff) | |
| download | linux-9903bd7b73ef0dec429e951009b36643eb0fe239.tar.xz | |
userfaultfd: hugetlbfs: add userfaultfd_hugetlb test
Test userfaultfd hugetlb functionality by using the existing testing
method (in userfaultfd.c). Instead of an anonymous memeory, a hugetlbfs
file is mmap'ed private. In this way fallocate hole punch can be used
to release pages. This is because madvise(MADV_DONTNEED) is not
supported for huge pages.
Use the same file, but create wrappers for allocating ranges and
releasing pages. Compile userfaultfd.c with HUGETLB_TEST defined to
produce an executable to test userfaultfd hugetlb functionality.
Link: http://lkml.kernel.org/r/20161216144821.5183-23-aarcange@redhat.com
Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michael Rapoport <RAPOPORT@il.ibm.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/userfaultfd.c')
0 files changed, 0 insertions, 0 deletions