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

[Jochen Friedrich]

Am Mon, 18 Jul 2011 schrieb 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) {

Debian just switched to a version containing this patch in sid.
This prevents autoloading vboxmouse driver as the corresponding device is in
subsystem "misc". Adding matches for "misc" enables autoloading again.

Thanks, Jochen