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hashmap: speed up hashmap allocations by introducing an allocation cache
[elogind.git]
/
src
/
cgroup-util.c
diff --git
a/src/cgroup-util.c
b/src/cgroup-util.c
index bbadc789a1651a30a2d995c85f807c704dc41b84..fd0ac98e28faad081e1b2faa17425b592f2e9ea7 100644
(file)
--- a/
src/cgroup-util.c
+++ b/
src/cgroup-util.c
@@
-482,12
+482,26
@@
finish:
int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs) {
const char *p;
int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs) {
const char *p;
- char *
mp
;
-
int r
;
+ char *
t
;
+
static __thread bool good = false
;
assert(controller);
assert(fs);
assert(controller);
assert(fs);
+ if (_unlikely_(!good)) {
+ int r;
+
+ r = path_is_mount_point("/sys/fs/cgroup");
+ if (r <= 0)
+ return r < 0 ? r : -ENOENT;
+
+ /* Cache this to save a few stat()s */
+ good = true;
+ }
+
+ if (isempty(controller))
+ return -EINVAL;
+
/* This is a very minimal lookup from controller names to
* paths. Since we have mounted most hierarchies ourselves
* should be kinda safe, but eventually we might want to
/* This is a very minimal lookup from controller names to
* paths. Since we have mounted most hierarchies ourselves
* should be kinda safe, but eventually we might want to
@@
-501,29
+515,22
@@
int cg_get_path(const char *controller, const char *path, const char *suffix, ch
else
p = controller;
else
p = controller;
- if (asprintf(&mp, "/sys/fs/cgroup/%s", p) < 0)
- return -ENOMEM;
-
- if ((r = path_is_mount_point(mp)) <= 0) {
- free(mp);
- return r < 0 ? r : -ENOENT;
- }
-
if (path && suffix)
if (path && suffix)
-
r = asprintf(fs, "%s/%s/%s", mp, path, suffix
);
+
t = join("/sys/fs/cgroup/", p, "/", path, "/", suffix, NULL
);
else if (path)
else if (path)
-
r = asprintf(fs, "%s/%s", mp, path
);
+
t = join("/sys/fs/cgroup/", p, "/", path, NULL
);
else if (suffix)
else if (suffix)
-
r = asprintf(fs, "%s/%s", mp, suffix
);
- else
{
-
path_kill_slashes(mp
);
- *fs = mp;
- return 0;
- }
+
t = join("/sys/fs/cgroup/", p, "/", suffix, NULL
);
+ else
+
t = join("/sys/fs/cgroup/", p, NULL
);
+
+ if (!t)
+ return -ENOMEM;
- free(mp);
- path_kill_slashes(*fs);
- return r < 0 ? -ENOMEM : 0;
+ path_kill_slashes(t);
+
+ *fs = t;
+ return 0;
}
int cg_trim(const char *controller, const char *path, bool delete_root) {
}
int cg_trim(const char *controller, const char *path, bool delete_root) {