diff options
Diffstat (limited to 'README')
| -rw-r--r-- | README | 25 |
1 files changed, 12 insertions, 13 deletions
@@ -9,11 +9,13 @@ Important Note: recommend to replace a distro's udev installation with the upstream version. Requirements: - - Version 2.6.22 of the Linux kernel for reliable operation of this release of - udev. The kernel must not use the CONFIG_SYSFS_DEPRECATED* option. + - Version 2.6.25 of the Linux kernel with sysfs, procfs, signalfd, inotify, + unix domain sockets, networking and hotplug enabled. - - The kernel must have sysfs, unix domain sockets and networking enabled. - Unix domain sockets (CONFIG_UNIX) as a loadable kernel module is not + - For reliable operation, the kernel must not use the CONFIG_SYSFS_DEPRECATED* + option. + + - Unix domain sockets (CONFIG_UNIX) as a loadable kernel module is not supported. - The proc filesystem must be mounted on /proc/, the sysfs filesystem must @@ -29,21 +31,18 @@ Operation: Udev creates and removes device nodes in /dev/, based on events the kernel sends out on device discovery or removal. - - 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. + - Early in the boot process, the /dev/ directory should get a 'tmpfs' + filesystem mounted, which is maintained by udev. Created nodes or changed + permissions will not survive a reboot, which is intentional. - The content of /lib/udev/devices/ directory which contains the nodes, symlinks and directories, which are always expected to be in /dev, should be copied over to the tmpfs mounted /dev, to provide the required nodes to initialize udev and continue booting. - - 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. - - - The udevd daemon must be started on bootup to receive netlink uevents - from the kernel driver core. + - The old hotplug helper /sbin/hotplug should be disabled in the kernel + configuration, it is not needed, and may render the system unusable + because of a fork-bombing behavior. - All kernel events are matched against a set of specified rules in /lib/udev/rules.d/ which make it possible to hook into the event |