[ovs-dev] [PATCHv2] ovs-lib: Add timeout at ovs-check-dead-ifs.

[William Tu]

At SUSE12 SP3, we hit a case where ovs-check-dead-ifs tries to read
an entry in /proc/<pid>/fd/<some fd> but hangs forever.  The pid is
a qemu-system-x86_64 process and we suspect it's an issue related to
qemu, not ovs.  As a result, force-reload-kmod hangs and OVS bridge
never gets restarted. This patch adds a timeout of 5-seconds to
ovs-check-dead-ifs.

VMware-BZ: #2408059
Signed-off-by: William Tu <u9012063 at gmail.com>
Cc: Ashish Varma <ashishvarma.ovs at gmail.com>
Cc: Gurucharan Shetty <guru at ovn.org>
---
v2: address feedback from Guru
---
 utilities/ovs-lib.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/utilities/ovs-lib.in b/utilities/ovs-lib.in
index 76ce79b9c39f..c8c09dd12d31 100644
--- a/utilities/ovs-lib.in
+++ b/utilities/ovs-lib.in
@@ -654,7 +654,8 @@ force_reload_kmod () {
 
     restore_interfaces
 
-    "$datadir/scripts/ovs-check-dead-ifs"
+    action "Finding processes on dead interfaces" timeout 5 \
+        "$datadir/scripts/ovs-check-dead-ifs" || true
 }
 
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-- 
2.7.4