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authorKay Sievers <kay.sievers@suse.de>2006-08-07 03:13:27 +0200
committerKay Sievers <kay.sievers@suse.de>2006-08-07 03:13:27 +0200
commit15c02d46f5b7061808c5d37753a2e6cb90f472c8 (patch)
treef8399fefb520f5a6f4b5263d35eb0ac2c5131cbb /README
parent9824e9a76426eef53713349c0464e9d1411e3b66 (diff)
update README
Diffstat (limited to 'README')
-rw-r--r--README30
1 files changed, 14 insertions, 16 deletions
diff --git a/README b/README
index 92088ac6f5..74aa7901cf 100644
--- a/README
+++ b/README
@@ -6,31 +6,29 @@ Important Note:
Integrating udev in the system is a whole lot of work, has complex dependencies
and differs a lot from distro to distro. All major distros depend on udev these
days and the system may not work without a proper installed version. The upstream
- udev project does not support or recomend to replace a distro's udev installation
+ udev project does not support or recommend to replace a distro's udev installation
with the upstream version. The installation of a unmodified upstream version may
render your system unusable. Until now, there is no "default" setup or a set of
"default" rules provided by the upstream udev version.
Requirements:
- - 2.6.x version of the Linux kernel. See the RELEASE-NOTES file in the
- udev tree and the Documentation/Changes in the kernel source tree for
- the actual dependency.
+ - Version 2.6.15 of the Linux kernel for reliable operation of this release of
+ udev. The kernel may have a requirement on udev too, see Documentation/Changes
+ in the kernel source tree for the actual dependency.
- - The kernel must have sysfs and unix domain socket enabled.
+ - The kernel must have sysfs, unix domain sockets and networking enabled.
(unix domain sockets (CONFIG_UNIX) as a loadable kernel module may work,
- but it is completely silly - don't complain if anything goes wrong.)
+ but it is completely silly - don't complain if anything goes wrong.)
- - The proc filesystem must be mounted on /proc.
-
- - The sysfs filesystem must be mounted at /sys. No other location
- will be supported by udev.
+ - The proc filesystem must be mounted on /proc, the sysfs filesystem must
+ be mounted at /sys. No other location will be supported by udev.
Operation:
Udev creates and removes device nodes in /dev, based on events the kernel
sends out on device discovery or removal.
- - Early in the boot process, the /dev directory should get a tmpfs
+ - Very early in the boot process, the /dev directory should get a 'tmpfs'
filesystem mounted, which is populated from scratch by udev. Created nodes
or changed permissions will not survive a reboot, which is intentional.
@@ -39,12 +37,12 @@ Operation:
be copied over to the tmpfs mounted /dev, to provide the required nodes
to initialize udev and continue booting.
- - The udevd daemon must be started by an init script to receive netlink
- uevents from the kernel driver core.
+ - The old hotplug helper /sbin/hotplug should be disabled on bootup, before
+ actions like loading kernel modules are taken, which may cause a lot of
+ events.
- - From kernel version 2.6.15 on, the hotplug helper /sbin/hotplug should
- be disabled with an init script before actions like loading kernel
- modules are taken, which may cause a lot of events.
+ - The udevd daemon must be started on bootup to receive netlink uevents
+ from the kernel driver core.
- All kernel events are matched against a set of specified rules in
/etc/udev/rules.d/ which make it possible to hook into the event