From f5ce5e24f9cf18a37ef6aedb149891d07767b045 Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Wed, 4 Mar 2015 16:32:16 +0100
Subject: [PATCH] Remove the cap on epoll events

Currently the code will silently blank out events if there are more
then 512 epoll events, causing them never to be handled at all. This
patch removes the cap on the number of events for epoll_wait, thereby
avoiding this issue.

(cherry picked from commit 1c724e9e0ec5bc4bf791a3d7b1cf5b955cdb98b2)
---
 src/libsystemd/sd-event/sd-event.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
index 25089a033..c6350be9f 100644
--- a/src/libsystemd/sd-event/sd-event.c
+++ b/src/libsystemd/sd-event/sd-event.c
@@ -37,7 +37,6 @@
 
 #include "sd-event.h"
 
-#define EPOLL_QUEUE_MAX 512U
 #define DEFAULT_ACCURACY_USEC (250 * USEC_PER_MSEC)
 
 typedef enum EventSourceType {
@@ -2367,7 +2366,7 @@ _public_ int sd_event_wait(sd_event *e, uint64_t timeout) {
                 return 1;
         }
 
-        ev_queue_max = CLAMP(e->n_sources, 1U, EPOLL_QUEUE_MAX);
+        ev_queue_max = MAX(e->n_sources, 1u);
         ev_queue = newa(struct epoll_event, ev_queue_max);
 
         m = epoll_wait(e->epoll_fd, ev_queue, ev_queue_max,