logind: process session/inhibitor fds at higher priority

Let's make sure we process session and inhibitor pipe fds (that signal
sessions/inhibtors going away) at a higher priority
than new bus calls that might create new sessions or inhibitors. This helps
ensuring that the number of open sessions stays minimal.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/login/logind-session.c b/src/login/logind-session.c
index a8b1d5943d..d2f1f7bc62 100644
--- a/src/login/logind-session.c
+++ b/src/login/logind-session.c
@@ -897,7 +897,9 @@ int session_create_fifo(Session *s) {
                 if (r < 0)
                         return r;
 
-                r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE);
+                /* Let's make sure we noticed dead sessions before we process new bus requests (which might create new
+                 * sessions). */
+                r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_NORMAL-10);
                 if (r < 0)
                         return r;
         }