virCgroupRemove return -1 when removing cgroup failed. But there are retry code to remove cgroup in QemuProcessStop: retry: if ((ret = qemuRemoveCgroup(vm)) < 0) { if (ret == -EBUSY && (retries++ < 5)) { usleep(200*1000); goto retry; } VIR_WARN("Failed to remove cgroup for %s", vm->def->name); } The return value of qemuRemoveCgroup will never be equal to "-EBUSY", so change the return value of virCgroupRemove if failed. Signed-off-by: Wang Yechao <wang.yechao255(a)zte.com.cn&gt; --- src/util/vircgroup.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c index 268e401..260ed2d 100644 --- a/src/util/vircgroup.c +++ b/src/util/vircgroup.c @@ -2399,11 +2399,13 @@ int virCgroupRemove(virCgroupPtr group) { size_t i; + int ret = 0; for (i = 0; i < VIR_CGROUP_BACKEND_TYPE_LAST; i++) { - if (group->backends[i] && - group->backends[i]->remove(group) < 0) { - return -1; + if (group->backends[i]) + ret = group->backends[i]->remove(group); + if (ret < 0) + return ret; } }