[PATCH 2/4] xserver: limit the kernel subsystems we look for devices in

[Lennart Poettering]

Don't enumerate/monitor all devices of the system (since that can be
quite a few), but limit our search to devices from the "input"
subsystem, as well as the "tty" subsystem (to cover Wacom tablets).

This should make X start up a bit faster and reduce the number of
unnecessary wake-ups of the X server.
---
 config/udev.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/config/udev.c b/config/udev.c
index 5ac52a1..0763cc9 100644
--- a/config/udev.c
+++ b/config/udev.c
@@ -281,6 +281,9 @@ config_udev_init(void)
     if (!udev_monitor)
         return 0;
 
+    udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "input", NULL);
+    udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL); /* For Wacom serial devices */
+
     if (udev_monitor_enable_receiving(udev_monitor)) {
         ErrorF("config/udev: failed to bind the udev monitor\n");
         return 0;
@@ -289,6 +292,10 @@ config_udev_init(void)
     enumerate = udev_enumerate_new(udev);
     if (!enumerate)
         return 0;
+
+    udev_enumerate_add_match_subsystem(enumerate, "input");
+    udev_enumerate_add_match_subsystem(enumerate, "tty");
+
     udev_enumerate_scan_devices(enumerate);
     devices = udev_enumerate_get_list_entry(enumerate);
     udev_list_entry_foreach(device, devices) {
-- 
1.7.6



Lennart

-- 
Lennart Poettering - Red Hat, Inc.