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- /* -*- auto-fill -*- */
- Device File System (devfs) Boot Options
- Richard Gooch <rgooch@atnf.csiro.au>
- 18-AUG-2001
- 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
- You may prefix "no" to any option. This will invert the option.
- 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
- diget print VFS inode allocations
- diunlink print inode unlinks
- dichange print inode changes
- dimknod print calls to mknod(2)
- dall some debugging turned on
- Other Options
- =============
- These control the default behaviour of devfs. The options are:
- mount mount devfs onto /dev at boot time
- only disable non-devfs device nodes for devfs-capable drivers
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