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-rw-r--r--Documentation/s390/CommonIO8
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/s390/CommonIO b/Documentation/s390/CommonIO
index bf0baa19ec24..428e5c859b69 100644
--- a/Documentation/s390/CommonIO
+++ b/Documentation/s390/CommonIO
@@ -70,13 +70,19 @@ Command line parameters
70 70
71 Note: While already known devices can be added to the list of devices to be 71 Note: While already known devices can be added to the list of devices to be
72 ignored, there will be no effect on then. However, if such a device 72 ignored, there will be no effect on then. However, if such a device
73 disappears and then reappears, it will then be ignored. 73 disappears and then reappears, it will then be ignored. To make
74 known devices go away, you need the "purge" command (see below).
74 75
75 For example, 76 For example,
76 "echo add 0.0.a000-0.0.accc, 0.0.af00-0.0.afff > /proc/cio_ignore" 77 "echo add 0.0.a000-0.0.accc, 0.0.af00-0.0.afff > /proc/cio_ignore"
77 will add 0.0.a000-0.0.accc and 0.0.af00-0.0.afff to the list of ignored 78 will add 0.0.a000-0.0.accc and 0.0.af00-0.0.afff to the list of ignored
78 devices. 79 devices.
79 80
81 You can remove already known but now ignored devices via
82 "echo purge > /proc/cio_ignore"
83 All devices ignored but still registered and not online (= not in use)
84 will be deregistered and thus removed from the system.
85
80 The devices can be specified either by bus id (0.x.abcd) or, for 2.4 backward 86 The devices can be specified either by bus id (0.x.abcd) or, for 2.4 backward
81 compatibility, by the device number in hexadecimal (0xabcd or abcd). Device 87 compatibility, by the device number in hexadecimal (0xabcd or abcd). Device
82 numbers given as 0xabcd will be interpreted as 0.0.abcd. 88 numbers given as 0xabcd will be interpreted as 0.0.abcd.