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Date: Tue, 18 Apr 2023 14:44:46 +0300
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: linux-kselftest@...r.kernel.org,
Reinette Chatre <reinette.chatre@...el.com>,
Fenghua Yu <fenghua.yu@...el.com>,
Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org
Cc: Shaopeng Tan <tan.shaopeng@...fujitsu.com>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH v2 04/24] selftests/resctrl: Remove mum_resctrlfs
Resctrl FS mount/umount are now cleanly paired.
Removed mum_resctrlfs that is what is left of the earlier remount
trickery to make the code cleaner. Rename remount_resctrlfs() to
mount_resctrlfs() to match the reduced functionality.
While at it, group the mount/umount prototypes in the header.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
---
tools/testing/selftests/resctrl/cat_test.c | 1 -
tools/testing/selftests/resctrl/cmt_test.c | 1 -
tools/testing/selftests/resctrl/mba_test.c | 1 -
tools/testing/selftests/resctrl/mbm_test.c | 1 -
tools/testing/selftests/resctrl/resctrl.h | 4 +---
.../testing/selftests/resctrl/resctrl_tests.c | 8 ++++----
tools/testing/selftests/resctrl/resctrlfs.c | 20 +++++--------------
7 files changed, 10 insertions(+), 26 deletions(-)
diff --git a/tools/testing/selftests/resctrl/cat_test.c b/tools/testing/selftests/resctrl/cat_test.c
index dec3151cf888..86c62dfd8e78 100644
--- a/tools/testing/selftests/resctrl/cat_test.c
+++ b/tools/testing/selftests/resctrl/cat_test.c
@@ -140,7 +140,6 @@ int cat_perf_miss_val(int cpu_no, int n, char *cache_type)
struct resctrl_val_param param = {
.resctrl_val = CAT_STR,
.cpu_no = cpu_no,
- .mum_resctrlfs = false,
.setup = cat_setup,
};
diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
index 426d11189a99..d31e28416bb7 100644
--- a/tools/testing/selftests/resctrl/cmt_test.c
+++ b/tools/testing/selftests/resctrl/cmt_test.c
@@ -113,7 +113,6 @@ int cmt_resctrl_val(int cpu_no, int n, char **benchmark_cmd)
.ctrlgrp = "c1",
.mongrp = "m1",
.cpu_no = cpu_no,
- .mum_resctrlfs = false,
.filename = RESULT_FILE_NAME,
.mask = ~(long_mask << n) & long_mask,
.span = cache_size * n / count_of_bits,
diff --git a/tools/testing/selftests/resctrl/mba_test.c b/tools/testing/selftests/resctrl/mba_test.c
index cde3781a9ab0..3d53c6c9b9ce 100644
--- a/tools/testing/selftests/resctrl/mba_test.c
+++ b/tools/testing/selftests/resctrl/mba_test.c
@@ -154,7 +154,6 @@ int mba_schemata_change(int cpu_no, char *bw_report, char **benchmark_cmd)
.ctrlgrp = "c1",
.mongrp = "m1",
.cpu_no = cpu_no,
- .mum_resctrlfs = true,
.filename = RESULT_FILE_NAME,
.bw_report = bw_report,
.setup = mba_setup
diff --git a/tools/testing/selftests/resctrl/mbm_test.c b/tools/testing/selftests/resctrl/mbm_test.c
index 538d35a6485a..24326cb7bc21 100644
--- a/tools/testing/selftests/resctrl/mbm_test.c
+++ b/tools/testing/selftests/resctrl/mbm_test.c
@@ -123,7 +123,6 @@ int mbm_bw_change(int span, int cpu_no, char *bw_report, char **benchmark_cmd)
.mongrp = "m1",
.span = span,
.cpu_no = cpu_no,
- .mum_resctrlfs = true,
.filename = RESULT_FILE_NAME,
.bw_report = bw_report,
.setup = mbm_setup
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h
index 87e39456dee0..c737eb47eacc 100644
--- a/tools/testing/selftests/resctrl/resctrl.h
+++ b/tools/testing/selftests/resctrl/resctrl.h
@@ -53,7 +53,6 @@
* @mongrp: Name of the monitor group (mon grp)
* @cpu_no: CPU number to which the benchmark would be binded
* @span: Memory bytes accessed in each benchmark iteration
- * @mum_resctrlfs: Should the resctrl FS be remounted?
* @filename: Name of file to which the o/p should be written
* @bw_report: Bandwidth report type (reads vs writes)
* @setup: Call back function to setup test environment
@@ -64,7 +63,6 @@ struct resctrl_val_param {
char mongrp[64];
int cpu_no;
unsigned long span;
- bool mum_resctrlfs;
char filename[64];
char *bw_report;
unsigned long mask;
@@ -84,8 +82,8 @@ extern char llc_occup_path[1024];
int get_vendor(void);
bool check_resctrlfs_support(void);
int filter_dmesg(void);
-int remount_resctrlfs(bool mum_resctrlfs);
int get_resource_id(int cpu_no, int *resource_id);
+int mount_resctrlfs(void);
int umount_resctrlfs(void);
int validate_bw_report_request(char *bw_report);
bool validate_resctrl_feature_request(const char *resctrl_val);
diff --git a/tools/testing/selftests/resctrl/resctrl_tests.c b/tools/testing/selftests/resctrl/resctrl_tests.c
index 5c9ed52b69f2..f3303459136d 100644
--- a/tools/testing/selftests/resctrl/resctrl_tests.c
+++ b/tools/testing/selftests/resctrl/resctrl_tests.c
@@ -77,7 +77,7 @@ static void run_mbm_test(bool has_ben, char **benchmark_cmd, int span,
ksft_print_msg("Starting MBM BW change ...\n");
- res = remount_resctrlfs(false);
+ res = mount_resctrlfs();
if (res) {
ksft_exit_fail_msg("Failed to mount resctrl FS\n");
return;
@@ -106,7 +106,7 @@ static void run_mba_test(bool has_ben, char **benchmark_cmd, int span,
ksft_print_msg("Starting MBA Schemata change ...\n");
- res = remount_resctrlfs(false);
+ res = mount_resctrlfs();
if (res) {
ksft_exit_fail_msg("Failed to mount resctrl FS\n");
return;
@@ -132,7 +132,7 @@ static void run_cmt_test(bool has_ben, char **benchmark_cmd, int cpu_no)
ksft_print_msg("Starting CMT test ...\n");
- res = remount_resctrlfs(false);
+ res = mount_resctrlfs();
if (res) {
ksft_exit_fail_msg("Failed to mount resctrl FS\n");
return;
@@ -160,7 +160,7 @@ static void run_cat_test(int cpu_no, int no_of_bits)
ksft_print_msg("Starting CAT test ...\n");
- res = remount_resctrlfs(false);
+ res = mount_resctrlfs();
if (res) {
ksft_exit_fail_msg("Failed to mount resctrl FS\n");
return;
diff --git a/tools/testing/selftests/resctrl/resctrlfs.c b/tools/testing/selftests/resctrl/resctrlfs.c
index 42f547a81e25..45f785213143 100644
--- a/tools/testing/selftests/resctrl/resctrlfs.c
+++ b/tools/testing/selftests/resctrl/resctrlfs.c
@@ -48,29 +48,19 @@ static int find_resctrl_mount(char *buffer)
}
/*
- * remount_resctrlfs - Remount resctrl FS at /sys/fs/resctrl
- * @mum_resctrlfs: Should the resctrl FS be remounted?
+ * mount_resctrlfs - Mount resctrl FS at /sys/fs/resctrl
*
* If not mounted, mount it.
- * If mounted and mum_resctrlfs then remount resctrl FS.
- * If mounted and !mum_resctrlfs then noop
*
* Return: 0 on success, non-zero on failure
*/
-int remount_resctrlfs(bool mum_resctrlfs)
+int mount_resctrlfs(void)
{
- char mountpoint[256];
int ret;
- ret = find_resctrl_mount(mountpoint);
- if (ret)
- strcpy(mountpoint, RESCTRL_PATH);
-
- if (!ret && mum_resctrlfs && umount(mountpoint))
- ksft_print_msg("Fail: unmounting \"%s\"\n", mountpoint);
-
- if (!ret && !mum_resctrlfs)
- return 0;
+ ret = find_resctrl_mount(NULL);
+ if (!ret)
+ return -1;
ksft_print_msg("Mounting resctrl to \"%s\"\n", RESCTRL_PATH);
ret = mount("resctrl", RESCTRL_PATH, "resctrl", 0, NULL);
--
2.30.2
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