66 lines
1.6 KiB
Plaintext
66 lines
1.6 KiB
Plaintext
/* -*- auto-fill -*- */
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Device File System (devfs) Boot Options
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Richard Gooch <rgooch@atnf.csiro.au>
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18-AUG-2001
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When CONFIG_DEVFS_DEBUG is enabled, you can pass several boot options
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to the kernel to debug devfs. The boot options are prefixed by
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"devfs=", and are separated by commas. Spaces are not allowed. The
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syntax looks like this:
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devfs=<option1>,<option2>,<option3>
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and so on. For example, if you wanted to turn on debugging for module
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load requests and device registration, you would do:
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devfs=dmod,dreg
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You may prefix "no" to any option. This will invert the option.
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Debugging Options
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=================
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These requires CONFIG_DEVFS_DEBUG to be enabled.
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Note that all debugging options have 'd' as the first character. By
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default all options are off. All debugging output is sent to the
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kernel logs. The debugging options do not take effect until the devfs
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version message appears (just prior to the root filesystem being
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mounted).
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These are the options:
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dmod print module load requests to <request_module>
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dreg print device register requests to <devfs_register>
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dunreg print device unregister requests to <devfs_unregister>
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dchange print device change requests to <devfs_set_flags>
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dilookup print inode lookup requests
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diget print VFS inode allocations
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diunlink print inode unlinks
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dichange print inode changes
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dimknod print calls to mknod(2)
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dall some debugging turned on
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Other Options
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=============
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These control the default behaviour of devfs. The options are:
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mount mount devfs onto /dev at boot time
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only disable non-devfs device nodes for devfs-capable drivers
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