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authorMike Rapoport <rppt@linux.vnet.ibm.com>2017-02-23 02:43:46 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-23 03:41:29 +0300
commit419624daf0e827452837177c4b983dc0f1b6429f (patch)
tree9785e74b08bc9aea0371787d5287f81c96685756 /tools
parent1c9e8def43a3452e7af658b340f5f4f4ecde5c38 (diff)
downloadlinux-419624daf0e827452837177c4b983dc0f1b6429f.tar.xz
userfaultfd: shmem: add userfaultfd_shmem test
The test verifies that anonymous shared mapping can be used with userfault using the existing testing method. The shared memory area is allocated using mmap(..., MAP_SHARED | MAP_ANONYMOUS, ...) and released using madvise(MADV_REMOVE) Link: http://lkml.kernel.org/r/20161216144821.5183-35-aarcange@redhat.com Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.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 Kravetz <mike.kravetz@oracle.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 'tools')
-rw-r--r--tools/testing/selftests/vm/Makefile4
-rwxr-xr-xtools/testing/selftests/vm/run_vmtests11
-rw-r--r--tools/testing/selftests/vm/userfaultfd.c37
3 files changed, 50 insertions, 2 deletions
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 0114aac78e1f..900dfaf81051 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -11,6 +11,7 @@ BINARIES += thuge-gen
BINARIES += transhuge-stress
BINARIES += userfaultfd
BINARIES += userfaultfd_hugetlb
+BINARIES += userfaultfd_shmem
BINARIES += mlock-random-test
all: $(BINARIES)
@@ -22,6 +23,9 @@ userfaultfd: userfaultfd.c ../../../../usr/include/linux/kernel.h
userfaultfd_hugetlb: userfaultfd.c ../../../../usr/include/linux/kernel.h
$(CC) $(CFLAGS) -DHUGETLB_TEST -O2 -o $@ $< -lpthread
+userfaultfd_shmem: userfaultfd.c ../../../../usr/include/linux/kernel.h
+ $(CC) $(CFLAGS) -DSHMEM_TEST -O2 -o $@ $< -lpthread
+
mlock-random-test: mlock-random-test.c
$(CC) $(CFLAGS) -o $@ $< -lcap
diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests
index 14d697ee00c4..c92f6cf31d0a 100755
--- a/tools/testing/selftests/vm/run_vmtests
+++ b/tools/testing/selftests/vm/run_vmtests
@@ -116,6 +116,17 @@ else
fi
rm -f $mnt/ufd_test_file
+echo "----------------------------"
+echo "running userfaultfd_shmem"
+echo "----------------------------"
+./userfaultfd_shmem 128 32
+if [ $? -ne 0 ]; then
+ echo "[FAIL]"
+ exitcode=1
+else
+ echo "[PASS]"
+fi
+
#cleanup
umount $mnt
rm -rf $mnt
diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index d753a9161411..a5e5808c86cd 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -101,8 +101,9 @@ pthread_attr_t attr;
~(unsigned long)(sizeof(unsigned long long) \
- 1)))
-#ifndef HUGETLB_TEST
+#if !defined(HUGETLB_TEST) && !defined(SHMEM_TEST)
+/* Anonymous memory */
#define EXPECTED_IOCTLS ((1 << _UFFDIO_WAKE) | \
(1 << _UFFDIO_COPY) | \
(1 << _UFFDIO_ZEROPAGE))
@@ -127,10 +128,13 @@ static void allocate_area(void **alloc_area)
}
}
-#else /* HUGETLB_TEST */
+#else /* HUGETLB_TEST or SHMEM_TEST */
#define EXPECTED_IOCTLS UFFD_API_RANGE_IOCTLS_BASIC
+#ifdef HUGETLB_TEST
+
+/* HugeTLB memory */
static int release_pages(char *rel_area)
{
int ret = 0;
@@ -162,8 +166,37 @@ static void allocate_area(void **alloc_area)
huge_fd_off0 = *alloc_area;
}
+#elif defined(SHMEM_TEST)
+
+/* Shared memory */
+static int release_pages(char *rel_area)
+{
+ int ret = 0;
+
+ if (madvise(rel_area, nr_pages * page_size, MADV_REMOVE)) {
+ perror("madvise");
+ ret = 1;
+ }
+
+ return ret;
+}
+
+static void allocate_area(void **alloc_area)
+{
+ *alloc_area = mmap(NULL, nr_pages * page_size, PROT_READ | PROT_WRITE,
+ MAP_ANONYMOUS | MAP_SHARED, -1, 0);
+ if (*alloc_area == MAP_FAILED) {
+ fprintf(stderr, "shared memory mmap failed\n");
+ *alloc_area = NULL;
+ }
+}
+
+#else /* SHMEM_TEST */
+#error "Undefined test type"
#endif /* HUGETLB_TEST */
+#endif /* !defined(HUGETLB_TEST) && !defined(SHMEM_TEST) */
+
static int my_bcmp(char *str1, char *str2, size_t n)
{
unsigned long i;