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selftests: cgroup: add test_zswap program

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Patch series "selftests: cgroup: add zswap test program".

This series adds 2 zswap related selftests that verify known and fixed
issues.  A new dedicated test program (test_zswap) is proposed since the
test cases are specific to zswap and hosts specific helpers.

The first patch adds the (empty) test program, while the other 2 add an
actual test function each.


This patch (of 3):

Add empty cgroup-zswap self test scaffold program, test functions to be
added in the next commits.

Link: https://lkml.kernel.org/r/20230621153548.428093-1-cerasuolodomenico@gmail.com
Link: https://lkml.kernel.org/r/20230621153548.428093-2-cerasuolodomenico@gmail.com
Signed-off-by: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Cc: Zefan Li <lizefan.x@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Domenico Cerasuolo 2023-06-21 17:35:46 +02:00 committed by Andrew Morton
parent a2ebb51575
commit fe3b1bf19b
3 changed files with 65 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/testing/selftests/cgroup/.gitignore vendored
View File

@ -5,4 +5,5 @@ test_freezer
test_kmem
test_kill
test_cpu
test_zswap
wait_inotify

2
tools/testing/selftests/cgroup/Makefile
View File

@ -12,6 +12,7 @@ TEST_GEN_PROGS += test_core
TEST_GEN_PROGS += test_freezer
TEST_GEN_PROGS += test_kill
TEST_GEN_PROGS += test_cpu
TEST_GEN_PROGS += test_zswap
LOCAL_HDRS += $(selfdir)/clone3/clone3_selftests.h $(selfdir)/pidfd/pidfd.h
@ -23,3 +24,4 @@ $(OUTPUT)/test_core: cgroup_util.c
$(OUTPUT)/test_freezer: cgroup_util.c
$(OUTPUT)/test_kill: cgroup_util.c
$(OUTPUT)/test_cpu: cgroup_util.c
$(OUTPUT)/test_zswap: cgroup_util.c

62
tools/testing/selftests/cgroup/test_zswap.c Normal file
View File

@ -0,0 +1,62 @@
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <linux/limits.h>
#include <unistd.h>
#include <stdio.h>
#include "../kselftest.h"
#include "cgroup_util.h"
#define T(x) { x, #x }
struct zswap_test {
int (*fn)(const char *root);
const char *name;
} tests[] = {
};
#undef T
static bool zswap_configured(void)
{
return access("/sys/module/zswap", F_OK) == 0;
}
int main(int argc, char **argv)
{
char root[PATH_MAX];
int i, ret = EXIT_SUCCESS;
if (cg_find_unified_root(root, sizeof(root)))
ksft_exit_skip("cgroup v2 isn't mounted\n");
if (!zswap_configured())
ksft_exit_skip("zswap isn't configured\n");
/*
* Check that memory controller is available:
* memory is listed in cgroup.controllers
*/
if (cg_read_strstr(root, "cgroup.controllers", "memory"))
ksft_exit_skip("memory controller isn't available\n");
if (cg_read_strstr(root, "cgroup.subtree_control", "memory"))
if (cg_write(root, "cgroup.subtree_control", "+memory"))
ksft_exit_skip("Failed to set memory controller\n");
for (i = 0; i < ARRAY_SIZE(tests); i++) {
switch (tests[i].fn(root)) {
case KSFT_PASS:
ksft_test_result_pass("%s\n", tests[i].name);
break;
case KSFT_SKIP:
ksft_test_result_skip("%s\n", tests[i].name);
break;
default:
ret = EXIT_FAILURE;
ksft_test_result_fail("%s\n", tests[i].name);
break;
}
}
return ret;
}