[libvirt PATCH 04/25] vircgroupv2: properly detect empty tasks

Pavel Hrdina phrdina at redhat.com
Tue Nov 3 12:41:16 UTC 2020


With cgroups v2 the file cgroup.procs will never be empty if threading
is enabled as it will always have ID of all processes even if all
threads of the processes are moved to sub-cgroups. If that happens the
file cgroup.threads will be empty.

Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
---
 src/util/vircgroupv2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/util/vircgroupv2.c b/src/util/vircgroupv2.c
index 285b7675d9..65f5cc6bd0 100644
--- a/src/util/vircgroupv2.c
+++ b/src/util/vircgroupv2.c
@@ -521,7 +521,7 @@ virCgroupV2HasEmptyTasks(virCgroupPtr cgroup,
     int ret = -1;
     g_autofree char *content = NULL;
 
-    ret = virCgroupGetValueStr(cgroup, controller, "cgroup.procs", &content);
+    ret = virCgroupGetValueStr(cgroup, controller, "cgroup.threads", &content);
 
     if (ret == 0 && content[0] == '\0')
         ret = 1;
-- 
2.26.2




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