Re: [libvirt] [PATCH 2/5] vircgroup: Try harder to kill cgroup

Prior to rewrite of cgroup code we only had one backend to try. After the rewrite the virCgroupBackendGetAll() returns both backends (for v1 and v2). However, not both have to really be present on the system which results in killRecursive callback failing which in turn might mean we won't try the other backend. At the same time, this function reports no error as it should. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- src/util/vircgroup.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c index 3ebb3b0a0f..b8b56f1263 100644 --- a/src/util/vircgroup.c +++ b/src/util/vircgroup.c @@ -2606,6 +2606,7 @@ virCgroupKillRecursive(virCgroupPtr group, int signum) int ret = 0; int rc; size_t i; + bool backendAvailable = false; virCgroupBackendPtr *backends = virCgroupBackendGetAll(); virHashTablePtr pids = virHashCreateFull(100, NULL, @@ -2616,13 +2617,9 @@ virCgroupKillRecursive(virCgroupPtr group, int signum) VIR_DEBUG("group=%p path=%s signum=%d", group, group->path, signum); - if (!backends) { - ret = -1; - goto cleanup; - } - for (i = 0; i < VIR_CGROUP_BACKEND_TYPE_LAST; i++) { - if (backends[i]) { + if (backends && backends[i] && backends[i]->available()) { + backendAvailable = true; rc = backends[i]->killRecursive(group, signum, pids);