From 56a051de562cf112e64acd8e1becfe3a2c5173e7 Mon Sep 17 00:00:00 2001
From: Thomas Haller <thaller@redhat.com>
Date: Mon, 10 Jan 2022 20:32:54 +0100
Subject: [PATCH] platform: log when blocking poll() returns for reading
 netlink socket

Try to debug a hang in platform code, presumably during poll().
This logging seems useful for debugging this particular issue,
but it might be useful in general.
---
 src/libnm-platform/nm-linux-platform.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libnm-platform/nm-linux-platform.c b/src/libnm-platform/nm-linux-platform.c
index d726dd8632..3138e95a9a 100644
--- a/src/libnm-platform/nm-linux-platform.c
+++ b/src/libnm-platform/nm-linux-platform.c
@@ -9305,6 +9305,8 @@ after_read:
         pfd.events = POLLIN;
         r          = poll(&pfd, 1, timeout_msec);
 
+        _LOGT("netlink: read: poll done (r=%d)", r);
+
         if (r == 0) {
             /* timeout and there is nothing to read. */
             goto after_read;