userfaultfd: selftest

aagit · torvalds · commit c47174fc362a · 2015-09-04T16:54:41.000-07:00
This test allocates two virtual areas and bounces the physical memory
across the two virtual areas using only userfaultfd.

Signed-off-by: Andrea Arcangeli &lt;aarcange@redhat.com&gt;
Cc: Pavel Emelyanov &lt;xemul@parallels.com&gt;
Cc: Dave Hansen &lt;dave.hansen@intel.com&gt;
Cc: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
Cc: Shuah Khan &lt;shuah.kh@samsung.com&gt;
Cc: Shuah Khan &lt;shuahkh@osg.samsung.com&gt;
Signed-off-by: Andrew Morton &lt;akpm@linux-foundation.org&gt;
Signed-off-by: Linus Torvalds &lt;torvalds@linux-foundation.org&gt;
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
@@ -8,10 +8,13 @@ BINARIES += hugetlbfstest
 BINARIES += map_hugetlb
 BINARIES += thuge-gen
 BINARIES += transhuge-stress
+BINARIES += userfaultfd
 
 all: $(BINARIES)
 %: %.c
 	$(CC) $(CFLAGS) -o $@ $^ -lrt
+userfaultfd: userfaultfd.c
+	$(CC) $(CFLAGS) -O2 -o $@ $^ -lpthread
 
 TEST_PROGS := run_vmtests
 TEST_FILES := $(BINARIES)
diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests
@@ -86,6 +86,17 @@ else
 	echo "[PASS]"
 fi
 
+echo "--------------------"
+echo "running userfaultfd"
+echo "--------------------"
+./userfaultfd 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
