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cgroup: never migrate kernel threads out of the root cgroup
author
Lennart Poettering
<lennart@poettering.net>
Tue, 1 Sep 2015 15:53:14 +0000
(17:53 +0200)
committer
Sven Eden
<yamakuzure@gmx.net>
Tue, 14 Mar 2017 09:19:06 +0000
(10:19 +0100)
It won't work anyway.
src/basic/cgroup-util.c
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diff --git
a/src/basic/cgroup-util.c
b/src/basic/cgroup-util.c
index b3e92763cde20ca9526f83b2dfce79319f51f1d0..f96cd6339402e8182c32f00349dad11b2d704149 100644
(file)
--- a/
src/basic/cgroup-util.c
+++ b/
src/basic/cgroup-util.c
@@
-321,6
+321,14
@@
int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char
if (set_get(s, LONG_TO_PTR(pid)) == LONG_TO_PTR(pid))
continue;
+ /* Ignore kernel threads. Since they can only
+ * exist in the root cgroup, we only check for
+ * them there. */
+ if (cfrom &&
+ (isempty(pfrom) || path_equal(pfrom, "/")) &&
+ is_kernel_thread(pid) > 0)
+ continue;
+
r = cg_attach(cto, pto, pid);
if (r < 0) {
if (ret >= 0 && r != -ESRCH)