While running the ovn-scale-test [1] port-binding tests [2], I notice a
continual stream of messages such as this:

2016-08-04 13:05:28.705 547 INFO rally_ovs.plugins.ovs.scenarios.ovn [-] bind 
lport_0996bf_cikzNO to sandbox-172.16.200.24 on 
ovn-farm-node-uat-dal09-compute-325
2016-08-04 13:05:28.712 547 INFO paramiko.transport [-] Connected (version 2.0, 
client OpenSSH_6.6.1p1)
2016-08-04 13:05:28.805 547 INFO paramiko.transport [-] Authentication 
(publickey) successful!
2016-08-04T13:05:28Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04 13:05:29.042 547 INFO rally_ovs.plugins.ovs.scenarios.ovn [-] bind 
lport_0996bf_tvovcK to sandbox-172.16.200.24 on 
ovn-farm-node-uat-dal09-compute-325
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04 13:05:29.285 547 INFO rally_ovs.plugins.ovs.scenarios.ovn [-] bind 
lport_0996bf_HwG7AK to sandbox-172.16.200.24 on 
ovn-farm-node-uat-dal09-compute-325
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04 13:05:29.505 547 INFO rally_ovs.plugins.ovs.scenarios.ovn [-] bind 
lport_0996bf_Lqbv92 to sandbox-172.16.200.24 on 
ovn-farm-node-uat-dal09-compute-325
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04 13:05:29.724 547 INFO rally_ovs.plugins.ovs.scenarios.ovn [-] bind 
lport_0996bf_6f8uQW to sandbox-172.16.200.24 on 
ovn-farm-node-uat-dal09-compute-325
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04T13:05:29Z|00002|vsctl|WARN|/proc/0/cmdline: open failed (No such 
file or directory)
2016-08-04 13:05:29.944 547 INFO rally_ovs.plugins.ovs.scenarios.ovn [-] bind 
lport_0996bf_nKl2XF to sandbox-172.16.200.24 on 
ovn-farm-node-uat-dal09-compute-325

Tracing these down, this is due to the check in vsctl_parent_process_info(),
which is verifying if the parent process can be opened. Since ovn-scale-test
runs sandboxes in containers, and these are run as root, there is no /proc/0
in the container. Thus, the check fails, and the error message is printed out.
Lowering the log level here results in less logs being dumped for this failure
as ovn-scale-test runs.

[1] https://github.com/openvswitch/ovn-scale-test
[2] 
https://github.com/openvswitch/ovn-scale-test/blob/master/rally_ovs/plugins/ovs/scenarios/ovn.py#L255

Signed-off-by: Kyle Mestery <mest...@mestery.com>
---
 utilities/ovs-vsctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/utilities/ovs-vsctl.c b/utilities/ovs-vsctl.c
index 722dcd9..56f1906 100644
--- a/utilities/ovs-vsctl.c
+++ b/utilities/ovs-vsctl.c
@@ -2483,7 +2483,7 @@ vsctl_parent_process_info(void)
 
     f = fopen(procfile, "r");
     if (!f) {
-        VLOG_WARN("%s: open failed (%s)", procfile, ovs_strerror(errno));
+        VLOG_DBG("%s: open failed (%s)", procfile, ovs_strerror(errno));
         free(procfile);
         return NULL;
     }
-- 
2.7.4 (Apple Git-66)

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