From 9903bd7b73ef0dec429e951009b36643eb0fe239 Mon Sep 17 00:00:00 2001 From: Mike Kravetz Date: Wed, 22 Feb 2017 15:43:07 -0800 Subject: 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 Signed-off-by: Andrea Arcangeli Cc: "Dr. David Alan Gilbert" Cc: Hillf Danton Cc: Michael Rapoport Cc: Mike Rapoport Cc: Pavel Emelyanov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- tools/testing/selftests/vm/Makefile | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'tools/testing/selftests/vm/Makefile') diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index bbab7f4664ac..0114aac78e1f 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -10,6 +10,7 @@ BINARIES += on-fault-limit BINARIES += thuge-gen BINARIES += transhuge-stress BINARIES += userfaultfd +BINARIES += userfaultfd_hugetlb BINARIES += mlock-random-test all: $(BINARIES) @@ -18,6 +19,9 @@ all: $(BINARIES) userfaultfd: userfaultfd.c ../../../../usr/include/linux/kernel.h $(CC) $(CFLAGS) -O2 -o $@ $< -lpthread +userfaultfd_hugetlb: userfaultfd.c ../../../../usr/include/linux/kernel.h + $(CC) $(CFLAGS) -DHUGETLB_TEST -O2 -o $@ $< -lpthread + mlock-random-test: mlock-random-test.c $(CC) $(CFLAGS) -o $@ $< -lcap -- cgit