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/* -*- auto-fill -*- */ Device File System (devfs) Boot Options Richard Gooch <rgooch@atnf.csiro.au> 30-APR-2000 When CONFIG_DEVFS_DEBUG is enabled, you can pass several boot options to the kernel to debug devfs. The boot options are prefixed by "devfs=", and are separated by commas. Spaces are not allowed. The syntax looks like this: devfs=<option1>,<option2>,<option3> and so on. For example, if you wanted to turn on debugging for module load requests and device registration, you would do: devfs=dmod,dreg Debugging Options ================= These requires CONFIG_DEVFS_DEBUG to be enabled. Note that all debugging options have 'd' as the first character. By default all options are off. All debugging output is sent to the kernel logs. The debugging options do not take effect until the devfs version message appears (just prior to the root filesystem being mounted). These are the options: dmod print module load requests to <request_module> dreg print device register requests to <devfs_register> dunreg print device unregister requests to <devfs_unregister> dchange print device change requests to <devfs_set_flags> dilookup print inode lookup requests diread print inode reads diunlink print inode unlinks diwrite print inode writes dimknod print calls to mknod(2) dall some debugging turned on Other Options ============= These control the default behaviour of devfs. The options are: show show unregistered devices by default mount mount devfs onto /dev at boot time nomount do not mount devfs onto /dev at boot time only disable non-devfs device nodes for devfs-capable drivers |