[S390] cio: Update cio_ignore documentation.
Add documentation for the new "purge" cio_ignore parameter. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -70,13 +70,19 @@ Command line parameters
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Note: While already known devices can be added to the list of devices to be
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ignored, there will be no effect on then. However, if such a device
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disappears and then reappears, it will then be ignored.
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disappears and then reappears, it will then be ignored. To make
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known devices go away, you need the "purge" command (see below).
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For example,
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"echo add 0.0.a000-0.0.accc, 0.0.af00-0.0.afff > /proc/cio_ignore"
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will add 0.0.a000-0.0.accc and 0.0.af00-0.0.afff to the list of ignored
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devices.
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You can remove already known but now ignored devices via
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"echo purge > /proc/cio_ignore"
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All devices ignored but still registered and not online (= not in use)
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will be deregistered and thus removed from the system.
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The devices can be specified either by bus id (0.x.abcd) or, for 2.4 backward
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compatibility, by the device number in hexadecimal (0xabcd or abcd). Device
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numbers given as 0xabcd will be interpreted as 0.0.abcd.
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