From 9f334e7740a00e91f05b4b91c20f2bc152db3ea2 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 31 Aug 2015 13:07:24 +0200
Subject: [PATCH 39/47] sd-event: improve debug message when we fail to remove
 and fd from an epoll

Let's help users to debug issues with epoll fd removal by printing the
name of the event source.
---
 src/libsystemd/sd-event/sd-event.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
index 76964aa..3459f50 100644
--- a/src/libsystemd/sd-event/sd-event.c
+++ b/src/libsystemd/sd-event/sd-event.c
@@ -481,7 +481,8 @@ static void source_io_unregister(sd_event_source *s) {
                 return;
 
         r = epoll_ctl(s->event->epoll_fd, EPOLL_CTL_DEL, s->io.fd, NULL);
-        assert_log(r >= 0);
+        if (r < 0)
+                log_debug_errno(errno, "Failed to remove source %s from epoll: %m", strna(s->description));
 
         s->io.registered = false;
 }
-- 
2.5.0