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Diffstat (limited to 'tools/testing/selftests/mm/thp_settings.c')
-rw-r--r--tools/testing/selftests/mm/thp_settings.c46
1 files changed, 40 insertions, 6 deletions
diff --git a/tools/testing/selftests/mm/thp_settings.c b/tools/testing/selftests/mm/thp_settings.c
index a4163438108e..577eaab6266f 100644
--- a/tools/testing/selftests/mm/thp_settings.c
+++ b/tools/testing/selftests/mm/thp_settings.c
@@ -33,10 +33,11 @@ static const char * const thp_defrag_strings[] = {
};
static const char * const shmem_enabled_strings[] = {
+ "never",
"always",
"within_size",
"advise",
- "never",
+ "inherit",
"deny",
"force",
NULL
@@ -200,6 +201,7 @@ void thp_write_num(const char *name, unsigned long num)
void thp_read_settings(struct thp_settings *settings)
{
unsigned long orders = thp_supported_orders();
+ unsigned long shmem_orders = thp_shmem_supported_orders();
char path[PATH_MAX];
int i;
@@ -234,12 +236,24 @@ void thp_read_settings(struct thp_settings *settings)
settings->hugepages[i].enabled =
thp_read_string(path, thp_enabled_strings);
}
+
+ for (i = 0; i < NR_ORDERS; i++) {
+ if (!((1 << i) & shmem_orders)) {
+ settings->shmem_hugepages[i].enabled = SHMEM_NEVER;
+ continue;
+ }
+ snprintf(path, PATH_MAX, "hugepages-%ukB/shmem_enabled",
+ (getpagesize() >> 10) << i);
+ settings->shmem_hugepages[i].enabled =
+ thp_read_string(path, shmem_enabled_strings);
+ }
}
void thp_write_settings(struct thp_settings *settings)
{
struct khugepaged_settings *khugepaged = &settings->khugepaged;
unsigned long orders = thp_supported_orders();
+ unsigned long shmem_orders = thp_shmem_supported_orders();
char path[PATH_MAX];
int enabled;
int i;
@@ -271,6 +285,15 @@ void thp_write_settings(struct thp_settings *settings)
enabled = settings->hugepages[i].enabled;
thp_write_string(path, thp_enabled_strings[enabled]);
}
+
+ for (i = 0; i < NR_ORDERS; i++) {
+ if (!((1 << i) & shmem_orders))
+ continue;
+ snprintf(path, PATH_MAX, "hugepages-%ukB/shmem_enabled",
+ (getpagesize() >> 10) << i);
+ enabled = settings->shmem_hugepages[i].enabled;
+ thp_write_string(path, shmem_enabled_strings[enabled]);
+ }
}
struct thp_settings *thp_current_settings(void)
@@ -324,17 +347,18 @@ void thp_set_read_ahead_path(char *path)
dev_queue_read_ahead_path[sizeof(dev_queue_read_ahead_path) - 1] = '\0';
}
-unsigned long thp_supported_orders(void)
+static unsigned long __thp_supported_orders(bool is_shmem)
{
unsigned long orders = 0;
char path[PATH_MAX];
char buf[256];
- int ret;
- int i;
+ int ret, i;
+ char anon_dir[] = "enabled";
+ char shmem_dir[] = "shmem_enabled";
for (i = 0; i < NR_ORDERS; i++) {
- ret = snprintf(path, PATH_MAX, THP_SYSFS "hugepages-%ukB/enabled",
- (getpagesize() >> 10) << i);
+ ret = snprintf(path, PATH_MAX, THP_SYSFS "hugepages-%ukB/%s",
+ (getpagesize() >> 10) << i, is_shmem ? shmem_dir : anon_dir);
if (ret >= PATH_MAX) {
printf("%s: Pathname is too long\n", __func__);
exit(EXIT_FAILURE);
@@ -347,3 +371,13 @@ unsigned long thp_supported_orders(void)
return orders;
}
+
+unsigned long thp_supported_orders(void)
+{
+ return __thp_supported_orders(false);
+}
+
+unsigned long thp_shmem_supported_orders(void)
+{
+ return __thp_supported_orders(true);
+}