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cgroup: Skip mkdir() and subtree control if group already exists

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- No point in doing it twice
 - Don't anger the gods (possible kernel bugs)

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
This commit is contained in:
Joachim Wiberg
2021-04-07 11:58:48 +02:00
parent e3c424e129
commit 19b18afac9
1 changed files with 10 additions and 8 deletions
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src/cgroup.c
+10 -8
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@@ -86,16 +86,18 @@ static void group_init(char *path, int leaf, const char *cfg)
{
char *ptr, *s;
if (mkdir(path, 0755) && EEXIST != errno) {
_pe("Failed creating cgroup %s", path);
return;
if (!fisdir(path)) {
if (mkdir(path, 0755)) {
_pe("Failed creating cgroup %s", path);
return;
}
/* enable detected controllers on domain groups */
if (!leaf && fnwrite(controllers, "%s/cgroup.subtree_control", path))
_pe("Failed enabling %s for %s", controllers, path);
}
/* enable detected controllers on domain groups */
if (!leaf && fnwrite(controllers, "%s/cgroup.subtree_control", path))
_pe("Failed enabling %s for %s", controllers, path);
if (!cfg)
if (!cfg || !cfg[0])
return;
s = strdupa(cfg);