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Blame SOURCES/0330-logind-process-session-inhibitor-fds-at-higher-prior.patch

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From caca204d23babbdb0c688f543f3ee8d66a1a2001 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Wed, 4 May 2016 19:01:56 +0200
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Subject: [PATCH] logind: process session/inhibitor fds at higher priority
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Let's make sure we process session and inhibitor pipe fds (that signal
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sessions/inhibtors going away) at a higher priority
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than new bus calls that might create new sessions or inhibitors. This helps
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ensuring that the number of open sessions stays minimal.
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Cherry-picked from: e11544a8305ab9dea097c74bb16e296150c9cc10
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Resolves: #1305608
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---
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 src/login/logind-inhibit.c | 2 +-
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 src/login/logind-session.c | 4 +++-
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 src/login/logind.c         | 2 +-
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 3 files changed, 5 insertions(+), 3 deletions(-)
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diff --git a/src/login/logind-inhibit.c b/src/login/logind-inhibit.c
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index 84fee0e773..bf96898f2d 100644
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--- a/src/login/logind-inhibit.c
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+++ b/src/login/logind-inhibit.c
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@@ -303,7 +303,7 @@ int inhibitor_create_fifo(Inhibitor *i) {
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                 if (r < 0)
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                         return r;
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-                r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE);
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+                r = sd_event_source_set_priority(i->event_source, SD_EVENT_PRIORITY_IDLE-10);
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                 if (r < 0)
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                         return r;
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         }
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diff --git a/src/login/logind-session.c b/src/login/logind-session.c
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index dc24539f12..59f5a7ad5d 100644
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--- a/src/login/logind-session.c
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+++ b/src/login/logind-session.c
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@@ -905,7 +905,9 @@ int session_create_fifo(Session *s) {
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                 if (r < 0)
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                         return r;
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-                r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_IDLE);
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+                /* Let's make sure we noticed dead sessions before we process new bus requests (which might create new
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+                 * sessions). */
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+                r = sd_event_source_set_priority(s->fifo_event_source, SD_EVENT_PRIORITY_NORMAL-10);
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                 if (r < 0)
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                         return r;
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         }
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diff --git a/src/login/logind.c b/src/login/logind.c
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index 3afbf34a13..e8d0669bbf 100644
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--- a/src/login/logind.c
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+++ b/src/login/logind.c
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@@ -685,7 +685,7 @@ static int manager_connect_bus(Manager *m) {
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         if (r < 0)
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                 return log_error_errno(r, "Failed to register name: %m");
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-        r = sd_bus_attach_event(m->bus, m->event, 0);
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+        r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
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         if (r < 0)
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                 return log_error_errno(r, "Failed to attach bus to event loop: %m");
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