From c2695a243c2741939080ef92e06f0dfddb59d2af 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 25089a0335..c6350be9f4 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,