First two are cleanups, third adds hugetlbfstest. This test fails on
current kernels, but I have previously sent a patchset to fix the two
failures.
Joern Engel (3):
selftests: exit 1 on failure
self-test: fix make clean
selftests: add hugetlbfstest
tools/testing/selftests/vm/Makefile | 7 ++-
tools/testing/selftests/vm/hugetlbfstest.c | 84 ++++++++++++++++++++++++++++
tools/testing/selftests/vm/run_vmtests | 16 ++++++
3 files changed, 104 insertions(+), 3 deletions(-)
create mode 100644 tools/testing/selftests/vm/hugetlbfstest.c
--
1.7.10.4
As the confusing naming indicates, this test has some overlap with
pre-existing tests. Would be nice to merge them eventually. But since
it is only test code, cleanliness is much less important than mere
existence.
Signed-off-by: Joern Engel <[email protected]>
---
tools/testing/selftests/vm/Makefile | 2 +-
tools/testing/selftests/vm/hugetlbfstest.c | 84 ++++++++++++++++++++++++++++
tools/testing/selftests/vm/run_vmtests | 11 ++++
3 files changed, 96 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/vm/hugetlbfstest.c
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index cb3f5f2..3f94e1a 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -2,7 +2,7 @@
CC = $(CROSS_COMPILE)gcc
CFLAGS = -Wall
-BINARIES = hugepage-mmap hugepage-shm map_hugetlb thuge-gen
+BINARIES = hugepage-mmap hugepage-shm map_hugetlb thuge-gen hugetlbfstest
all: $(BINARIES)
%: %.c
diff --git a/tools/testing/selftests/vm/hugetlbfstest.c b/tools/testing/selftests/vm/hugetlbfstest.c
new file mode 100644
index 0000000..ea40ff8
--- /dev/null
+++ b/tools/testing/selftests/vm/hugetlbfstest.c
@@ -0,0 +1,84 @@
+#define _GNU_SOURCE
+#include <assert.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+typedef unsigned long long u64;
+
+static size_t length = 1 << 24;
+
+static u64 read_rss(void)
+{
+ char buf[4096], *s = buf;
+ int i, fd;
+ u64 rss;
+
+ fd = open("/proc/self/statm", O_RDONLY);
+ assert(fd > 2);
+ memset(buf, 0, sizeof(buf));
+ read(fd, buf, sizeof(buf) - 1);
+ for (i = 0; i < 1; i++)
+ s = strchr(s, ' ') + 1;
+ rss = strtoull(s, NULL, 10);
+ return rss << 12; /* assumes 4k pagesize */
+}
+
+static void do_mmap(int fd, int extra_flags, int unmap)
+{
+ int *p;
+ int flags = MAP_PRIVATE | MAP_POPULATE | extra_flags;
+ u64 before, after;
+
+ before = read_rss();
+ p = mmap(NULL, length, PROT_READ | PROT_WRITE, flags, fd, 0);
+ assert(p != MAP_FAILED ||
+ !"mmap returned an unexpected error");
+ after = read_rss();
+ assert(llabs(after - before - length) < 0x40000 ||
+ !"rss didn't grow as expected");
+ if (!unmap)
+ return;
+ munmap(p, length);
+ after = read_rss();
+ assert(llabs(after - before) < 0x40000 ||
+ !"rss didn't shrink as expected");
+}
+
+static int open_file(const char *path)
+{
+ int fd, err;
+
+ unlink(path);
+ fd = open(path, O_CREAT | O_RDWR | O_TRUNC | O_EXCL
+ | O_LARGEFILE | O_CLOEXEC, 0600);
+ assert(fd > 2);
+ unlink(path);
+ err = ftruncate(fd, length);
+ assert(!err);
+ return fd;
+}
+
+int main(void)
+{
+ int hugefd, fd;
+
+ fd = open_file("/dev/shm/hugetlbhog");
+ hugefd = open_file("/hugepages/hugetlbhog");
+
+ system("echo 100 > /proc/sys/vm/nr_hugepages");
+ do_mmap(-1, MAP_ANONYMOUS, 1);
+ do_mmap(fd, 0, 1);
+ do_mmap(-1, MAP_ANONYMOUS | MAP_HUGETLB, 1);
+ do_mmap(hugefd, 0, 1);
+ do_mmap(hugefd, MAP_HUGETLB, 1);
+ /* Leak the last one to test do_exit() */
+ do_mmap(-1, MAP_ANONYMOUS | MAP_HUGETLB, 0);
+ printf("oll korrekt.\n");
+ return 0;
+}
diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests
index 7a9072d..c87b681 100644
--- a/tools/testing/selftests/vm/run_vmtests
+++ b/tools/testing/selftests/vm/run_vmtests
@@ -75,6 +75,17 @@ else
echo "[PASS]"
fi
+echo "--------------------"
+echo "running hugetlbfstest"
+echo "--------------------"
+./hugetlbfstest
+if [ $? -ne 0 ]; then
+ echo "[FAIL]"
+ exitcode=1
+else
+ echo "[PASS]"
+fi
+
#cleanup
umount $mnt
rm -rf $mnt
--
1.7.10.4
thuge-gen was forgotten. Fix it by removing the duplication, so we
don't get too many repeats.
Signed-off-by: Joern Engel <[email protected]>
---
tools/testing/selftests/vm/Makefile | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 7d47927..cb3f5f2 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -2,8 +2,9 @@
CC = $(CROSS_COMPILE)gcc
CFLAGS = -Wall
+BINARIES = hugepage-mmap hugepage-shm map_hugetlb thuge-gen
-all: hugepage-mmap hugepage-shm map_hugetlb thuge-gen
+all: $(BINARIES)
%: %.c
$(CC) $(CFLAGS) -o $@ $^
@@ -11,4 +12,4 @@ run_tests: all
@/bin/sh ./run_vmtests || (echo "vmtests: [FAIL]"; exit 1)
clean:
- $(RM) hugepage-mmap hugepage-shm map_hugetlb
+ $(RM) $(BINARIES)
--
1.7.10.4
In case this ever gets scripted, it should return 0 on success and 1 on
failure. Parsing the output should be left to meatbags.
Signed-off-by: Joern Engel <[email protected]>
---
tools/testing/selftests/vm/Makefile | 2 +-
tools/testing/selftests/vm/run_vmtests | 5 +++++
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 436d2e8..7d47927 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -8,7 +8,7 @@ all: hugepage-mmap hugepage-shm map_hugetlb thuge-gen
$(CC) $(CFLAGS) -o $@ $^
run_tests: all
- @/bin/sh ./run_vmtests || echo "vmtests: [FAIL]"
+ @/bin/sh ./run_vmtests || (echo "vmtests: [FAIL]"; exit 1)
clean:
$(RM) hugepage-mmap hugepage-shm map_hugetlb
diff --git a/tools/testing/selftests/vm/run_vmtests b/tools/testing/selftests/vm/run_vmtests
index 4c53cae..7a9072d 100644
--- a/tools/testing/selftests/vm/run_vmtests
+++ b/tools/testing/selftests/vm/run_vmtests
@@ -4,6 +4,7 @@
#we need 256M, below is the size in kB
needmem=262144
mnt=./huge
+exitcode=0
#get pagesize and freepages from /proc/meminfo
while read name size unit; do
@@ -41,6 +42,7 @@ echo "--------------------"
./hugepage-mmap
if [ $? -ne 0 ]; then
echo "[FAIL]"
+ exitcode=1
else
echo "[PASS]"
fi
@@ -55,6 +57,7 @@ echo "--------------------"
./hugepage-shm
if [ $? -ne 0 ]; then
echo "[FAIL]"
+ exitcode=1
else
echo "[PASS]"
fi
@@ -67,6 +70,7 @@ echo "--------------------"
./map_hugetlb
if [ $? -ne 0 ]; then
echo "[FAIL]"
+ exitcode=1
else
echo "[PASS]"
fi
@@ -75,3 +79,4 @@ fi
umount $mnt
rm -rf $mnt
echo $nr_hugepgs > /proc/sys/vm/nr_hugepages
+exit $exitcode
--
1.7.10.4