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authorLinus Torvalds <torvalds@linux-foundation.org>2021-09-25 15:30:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-25 15:30:29 -0700
commit90316e6ea0f0d63dab4cc84f71a8e199ee4b9b6c (patch)
treeefc9ff113b6393c99b82c5f06e30cb225b864a4f
parenta5e0aceabef618e2bb3d96c096002d8326d46a83 (diff)
parentf5013d412a43662b63f3d5f3a804d63213acd471 (diff)
Merge tag 'linux-kselftest-fixes-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull Kselftest fixes from Shuah Khan: - fix to Kselftest common framework header install to run before other targets for it work correctly in parallel build case. - fixes to kvm test to not ignore fscanf() returns which could result in inconsistent test behavior and failures. * tag 'linux-kselftest-fixes-5.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: selftests: kvm: fix get_run_delay() ignoring fscanf() return warn selftests: kvm: move get_run_delay() into lib/test_util selftests:kvm: fix get_trans_hugepagesz() ignoring fscanf() return warn selftests:kvm: fix get_warnings_count() ignoring fscanf() return warn selftests: be sure to make khdr before other targets
-rw-r--r--tools/testing/selftests/kvm/include/test_util.h3
-rw-r--r--tools/testing/selftests/kvm/lib/test_util.c22
-rw-r--r--tools/testing/selftests/kvm/steal_time.c16
-rw-r--r--tools/testing/selftests/kvm/x86_64/mmio_warning_test.c3
-rw-r--r--tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c15
-rw-r--r--tools/testing/selftests/lib.mk1
6 files changed, 27 insertions, 33 deletions
diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h
index d79be15dd3d2..451fed5ce8e7 100644
--- a/tools/testing/selftests/kvm/include/test_util.h
+++ b/tools/testing/selftests/kvm/include/test_util.h
@@ -95,6 +95,8 @@ struct vm_mem_backing_src_alias {
uint32_t flag;
};
+#define MIN_RUN_DELAY_NS 200000UL
+
bool thp_configured(void);
size_t get_trans_hugepagesz(void);
size_t get_def_hugetlb_pagesz(void);
@@ -102,6 +104,7 @@ const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i);
size_t get_backing_src_pagesz(uint32_t i);
void backing_src_help(void);
enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name);
+long get_run_delay(void);
/*
* Whether or not the given source type is shared memory (as opposed to
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index af1031fed97f..a9107bfae402 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -11,6 +11,7 @@
#include <stdlib.h>
#include <time.h>
#include <sys/stat.h>
+#include <sys/syscall.h>
#include <linux/mman.h>
#include "linux/kernel.h"
@@ -129,13 +130,16 @@ size_t get_trans_hugepagesz(void)
{
size_t size;
FILE *f;
+ int ret;
TEST_ASSERT(thp_configured(), "THP is not configured in host kernel");
f = fopen("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size", "r");
TEST_ASSERT(f != NULL, "Error in opening transparent_hugepage/hpage_pmd_size");
- fscanf(f, "%ld", &size);
+ ret = fscanf(f, "%ld", &size);
+ ret = fscanf(f, "%ld", &size);
+ TEST_ASSERT(ret < 1, "Error reading transparent_hugepage/hpage_pmd_size");
fclose(f);
return size;
@@ -300,3 +304,19 @@ enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name)
TEST_FAIL("Unknown backing src type: %s", type_name);
return -1;
}
+
+long get_run_delay(void)
+{
+ char path[64];
+ long val[2];
+ FILE *fp;
+
+ sprintf(path, "/proc/%ld/schedstat", syscall(SYS_gettid));
+ fp = fopen(path, "r");
+ /* Return MIN_RUN_DELAY_NS upon failure just to be safe */
+ if (fscanf(fp, "%ld %ld ", &val[0], &val[1]) < 2)
+ val[1] = MIN_RUN_DELAY_NS;
+ fclose(fp);
+
+ return val[1];
+}
diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
index ecec30865a74..2172d65b85e4 100644
--- a/tools/testing/selftests/kvm/steal_time.c
+++ b/tools/testing/selftests/kvm/steal_time.c
@@ -10,7 +10,6 @@
#include <sched.h>
#include <pthread.h>
#include <linux/kernel.h>
-#include <sys/syscall.h>
#include <asm/kvm.h>
#include <asm/kvm_para.h>
@@ -20,7 +19,6 @@
#define NR_VCPUS 4
#define ST_GPA_BASE (1 << 30)
-#define MIN_RUN_DELAY_NS 200000UL
static void *st_gva[NR_VCPUS];
static uint64_t guest_stolen_time[NR_VCPUS];
@@ -217,20 +215,6 @@ static void steal_time_dump(struct kvm_vm *vm, uint32_t vcpuid)
#endif
-static long get_run_delay(void)
-{
- char path[64];
- long val[2];
- FILE *fp;
-
- sprintf(path, "/proc/%ld/schedstat", syscall(SYS_gettid));
- fp = fopen(path, "r");
- fscanf(fp, "%ld %ld ", &val[0], &val[1]);
- fclose(fp);
-
- return val[1];
-}
-
static void *do_steal_time(void *arg)
{
struct timespec ts, stop;
diff --git a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
index e6480fd5c4bd..8039e1eff938 100644
--- a/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
+++ b/tools/testing/selftests/kvm/x86_64/mmio_warning_test.c
@@ -82,7 +82,8 @@ int get_warnings_count(void)
FILE *f;
f = popen("dmesg | grep \"WARNING:\" | wc -l", "r");
- fscanf(f, "%d", &warnings);
+ if (fscanf(f, "%d", &warnings) < 1)
+ warnings = 0;
fclose(f);
return warnings;
diff --git a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c
index 117bf49a3d79..eda0d2a51224 100644
--- a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c
+++ b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c
@@ -14,7 +14,6 @@
#include <stdint.h>
#include <time.h>
#include <sched.h>
-#include <sys/syscall.h>
#define VCPU_ID 5
@@ -98,20 +97,6 @@ static void guest_code(void)
GUEST_DONE();
}
-static long get_run_delay(void)
-{
- char path[64];
- long val[2];
- FILE *fp;
-
- sprintf(path, "/proc/%ld/schedstat", syscall(SYS_gettid));
- fp = fopen(path, "r");
- fscanf(fp, "%ld %ld ", &val[0], &val[1]);
- fclose(fp);
-
- return val[1];
-}
-
static int cmp_timespec(struct timespec *a, struct timespec *b)
{
if (a->tv_sec > b->tv_sec)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index fa2ac0e56b43..fe7ee2b0f29c 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -48,6 +48,7 @@ ARCH ?= $(SUBARCH)
# When local build is done, headers are installed in the default
# INSTALL_HDR_PATH usr/include.
.PHONY: khdr
+.NOTPARALLEL:
khdr:
ifndef KSFT_KHDR_INSTALL_DONE
ifeq (1,$(DEFAULT_INSTALL_HDR_PATH))