254 lines
6.0 KiB
C
254 lines
6.0 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*\
|
||
|
|
*
|
||
|
|
* [Description]
|
||
|
|
*
|
||
|
|
* Conversion of the forth kself test in cgroup/test_memcontrol.c.
|
||
|
|
*
|
||
|
|
* Original description:
|
||
|
|
* "First, this test creates the following hierarchy:
|
||
|
|
* A memory.low = 50M, memory.max = 200M
|
||
|
|
* A/B memory.low = 50M, memory.current = 50M
|
||
|
|
* A/B/C memory.low = 75M, memory.current = 50M
|
||
|
|
* A/B/D memory.low = 25M, memory.current = 50M
|
||
|
|
* A/B/E memory.low = 500M, memory.current = 0
|
||
|
|
* A/B/F memory.low = 0, memory.current = 50M
|
||
|
|
*
|
||
|
|
* Usages are pagecache
|
||
|
|
* Then it creates A/G and creates a significant
|
||
|
|
* memory pressure in it.
|
||
|
|
*
|
||
|
|
* A/B memory.current ~= 50M
|
||
|
|
* A/B/C memory.current ~= 33M
|
||
|
|
* A/B/D memory.current ~= 17M
|
||
|
|
* A/B/E memory.current ~= 0
|
||
|
|
*
|
||
|
|
* After that it tries to allocate more than there is unprotected
|
||
|
|
* memory in A available, and checks that memory.low protects
|
||
|
|
* pagecache even in this case."
|
||
|
|
*
|
||
|
|
* The closest thing to memory.low on V1 is soft_limit_in_bytes which
|
||
|
|
* uses a different mechanism and has different semantics. So we only
|
||
|
|
* test on V2 like the selftest. We do test on more file systems, but
|
||
|
|
* not tempfs becaue it can't evict the page cache without swap. Also
|
||
|
|
* we avoid filesystems which allocate extra memory for buffer heads.
|
||
|
|
*
|
||
|
|
* The tolerances have been increased from the self tests.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define _GNU_SOURCE
|
||
|
|
|
||
|
|
#include <inttypes.h>
|
||
|
|
|
||
|
|
#include "memcontrol_common.h"
|
||
|
|
|
||
|
|
#define TMPDIR "mntdir"
|
||
|
|
|
||
|
|
static struct tst_cg_group *trunk_cg[3];
|
||
|
|
static struct tst_cg_group *leaf_cg[4];
|
||
|
|
static int fd = -1;
|
||
|
|
|
||
|
|
enum checkpoints {
|
||
|
|
CHILD_IDLE
|
||
|
|
};
|
||
|
|
|
||
|
|
enum trunk_cg {
|
||
|
|
A,
|
||
|
|
B,
|
||
|
|
G
|
||
|
|
};
|
||
|
|
|
||
|
|
enum leaf_cg {
|
||
|
|
C,
|
||
|
|
D,
|
||
|
|
E,
|
||
|
|
F
|
||
|
|
};
|
||
|
|
|
||
|
|
static void cleanup_sub_groups(void)
|
||
|
|
{
|
||
|
|
size_t i;
|
||
|
|
|
||
|
|
for (i = ARRAY_SIZE(leaf_cg); i > 0; i--) {
|
||
|
|
if (!leaf_cg[i - 1])
|
||
|
|
continue;
|
||
|
|
|
||
|
|
leaf_cg[i - 1] = tst_cg_group_rm(leaf_cg[i - 1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = ARRAY_SIZE(trunk_cg); i > 0; i--) {
|
||
|
|
if (!trunk_cg[i - 1])
|
||
|
|
continue;
|
||
|
|
|
||
|
|
trunk_cg[i - 1] = tst_cg_group_rm(trunk_cg[i - 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void alloc_anon_in_child(const struct tst_cg_group *const cg,
|
||
|
|
const size_t size)
|
||
|
|
{
|
||
|
|
const pid_t pid = SAFE_FORK();
|
||
|
|
|
||
|
|
if (pid) {
|
||
|
|
tst_reap_children();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
SAFE_CG_PRINTF(cg, "cgroup.procs", "%d", getpid());
|
||
|
|
|
||
|
|
tst_res(TINFO, "Child %d in %s: Allocating anon: %"PRIdPTR,
|
||
|
|
getpid(), tst_cg_group_name(cg), size);
|
||
|
|
alloc_anon(size);
|
||
|
|
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void alloc_pagecache_in_child(const struct tst_cg_group *const cg,
|
||
|
|
const size_t size)
|
||
|
|
{
|
||
|
|
const pid_t pid = SAFE_FORK();
|
||
|
|
|
||
|
|
if (pid) {
|
||
|
|
tst_reap_children();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
SAFE_CG_PRINTF(cg, "cgroup.procs", "%d", getpid());
|
||
|
|
|
||
|
|
tst_res(TINFO, "Child %d in %s: Allocating pagecache: %"PRIdPTR,
|
||
|
|
getpid(), tst_cg_group_name(cg), size);
|
||
|
|
alloc_pagecache(fd, size);
|
||
|
|
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void test_memcg_low(void)
|
||
|
|
{
|
||
|
|
long c[4];
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
fd = SAFE_OPEN(TMPDIR"/tmpfile", O_RDWR | O_CREAT, 0600);
|
||
|
|
trunk_cg[A] = tst_cg_group_mk(tst_cg, "trunk_A");
|
||
|
|
|
||
|
|
SAFE_CG_SCANF(trunk_cg[A], "memory.low", "%ld", c);
|
||
|
|
if (c[0]) {
|
||
|
|
tst_brk(TCONF,
|
||
|
|
"memory.low already set to %ld on parent group", c[0]);
|
||
|
|
}
|
||
|
|
|
||
|
|
SAFE_CG_PRINT(trunk_cg[A], "cgroup.subtree_control", "+memory");
|
||
|
|
|
||
|
|
SAFE_CG_PRINT(trunk_cg[A], "memory.max", "200M");
|
||
|
|
SAFE_CG_PRINT(trunk_cg[A], "memory.swap.max", "0");
|
||
|
|
|
||
|
|
trunk_cg[B] = tst_cg_group_mk(trunk_cg[A], "trunk_B");
|
||
|
|
|
||
|
|
SAFE_CG_PRINT(trunk_cg[B], "cgroup.subtree_control", "+memory");
|
||
|
|
|
||
|
|
trunk_cg[G] = tst_cg_group_mk(trunk_cg[A], "trunk_G");
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(leaf_cg); i++) {
|
||
|
|
leaf_cg[i] = tst_cg_group_mk(trunk_cg[B],
|
||
|
|
"leaf_%c", 'C' + i);
|
||
|
|
|
||
|
|
if (i == E)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
alloc_pagecache_in_child(leaf_cg[i], MB(50));
|
||
|
|
}
|
||
|
|
|
||
|
|
SAFE_CG_PRINT(trunk_cg[A], "memory.low", "50M");
|
||
|
|
SAFE_CG_PRINT(trunk_cg[B], "memory.low", "50M");
|
||
|
|
SAFE_CG_PRINT(leaf_cg[C], "memory.low", "75M");
|
||
|
|
SAFE_CG_PRINT(leaf_cg[D], "memory.low", "25M");
|
||
|
|
SAFE_CG_PRINT(leaf_cg[E], "memory.low", "500M");
|
||
|
|
SAFE_CG_PRINT(leaf_cg[F], "memory.low", "0");
|
||
|
|
|
||
|
|
alloc_anon_in_child(trunk_cg[G], MB(148));
|
||
|
|
|
||
|
|
SAFE_CG_SCANF(trunk_cg[B], "memory.current", "%ld", c);
|
||
|
|
TST_EXP_EXPR(values_close(c[0], MB(50), 5),
|
||
|
|
"(A/B memory.current=%ld) ~= %d", c[0], MB(50));
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(leaf_cg); i++)
|
||
|
|
SAFE_CG_SCANF(leaf_cg[i], "memory.current", "%ld", c + i);
|
||
|
|
|
||
|
|
TST_EXP_EXPR(values_close(c[0], MB(33), 20),
|
||
|
|
"(A/B/C memory.current=%ld) ~= %d", c[C], MB(33));
|
||
|
|
TST_EXP_EXPR(values_close(c[1], MB(17), 20),
|
||
|
|
"(A/B/D memory.current=%ld) ~= %d", c[D], MB(17));
|
||
|
|
TST_EXP_EXPR(values_close(c[2], 0, 1),
|
||
|
|
"(A/B/E memory.current=%ld) ~= 0", c[E]);
|
||
|
|
tst_res(TINFO, "A/B/F memory.current=%ld", c[F]);
|
||
|
|
|
||
|
|
alloc_anon_in_child(trunk_cg[G], MB(166));
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(trunk_cg); i++) {
|
||
|
|
long low, oom;
|
||
|
|
const char id = "ABG"[i];
|
||
|
|
|
||
|
|
SAFE_CG_LINES_SCANF(trunk_cg[i], "memory.events",
|
||
|
|
"low %ld", &low);
|
||
|
|
SAFE_CG_LINES_SCANF(trunk_cg[i], "memory.events",
|
||
|
|
"oom %ld", &oom);
|
||
|
|
|
||
|
|
tst_res(TINFO, "%c: low events=%ld, oom events=%ld",
|
||
|
|
id, low, oom);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(leaf_cg); i++) {
|
||
|
|
long low, oom;
|
||
|
|
const char id = 'C' + i;
|
||
|
|
|
||
|
|
SAFE_CG_LINES_SCANF(leaf_cg[i], "memory.events",
|
||
|
|
"low %ld", &low);
|
||
|
|
SAFE_CG_LINES_SCANF(leaf_cg[i], "memory.events",
|
||
|
|
"oom %ld", &oom);
|
||
|
|
|
||
|
|
TST_EXP_EXPR(oom == 0, "(%c oom events=%ld) == 0", id, oom);
|
||
|
|
|
||
|
|
if (i < E) {
|
||
|
|
TST_EXP_EXPR(low > 0,
|
||
|
|
"(%c low events=%ld) > 0", id, low);
|
||
|
|
} else {
|
||
|
|
TST_EXP_EXPR(low == 0,
|
||
|
|
"(%c low events=%ld) == 0", id, low);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
cleanup_sub_groups();
|
||
|
|
SAFE_CLOSE(fd);
|
||
|
|
SAFE_UNLINK(TMPDIR"/tmpfile");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void cleanup(void)
|
||
|
|
{
|
||
|
|
cleanup_sub_groups();
|
||
|
|
if (fd > -1)
|
||
|
|
SAFE_CLOSE(fd);
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct tst_test test = {
|
||
|
|
.cleanup = cleanup,
|
||
|
|
.test_all = test_memcg_low,
|
||
|
|
.mount_device = 1,
|
||
|
|
.dev_min_size = 256,
|
||
|
|
.mntpoint = TMPDIR,
|
||
|
|
.all_filesystems = 1,
|
||
|
|
.skip_filesystems = (const char *const[]){
|
||
|
|
"exfat", "vfat", "fuse", "ntfs", "tmpfs", NULL
|
||
|
|
},
|
||
|
|
.forks_child = 1,
|
||
|
|
.needs_root = 1,
|
||
|
|
.needs_checkpoints = 1,
|
||
|
|
.needs_cgroup_ver = TST_CG_V2,
|
||
|
|
.needs_cgroup_ctrls = (const char *const[]){ "memory", NULL },
|
||
|
|
.tags = (const struct tst_tag[]) {
|
||
|
|
{
|
||
|
|
"known-fail",
|
||
|
|
"Low events in F: https://bugzilla.suse.com/show_bug.cgi?id=1196298"
|
||
|
|
},
|
||
|
|
{}
|
||
|
|
},
|
||
|
|
};
|