diff options
Diffstat (limited to 'Documentation/s390')
| -rw-r--r-- | Documentation/s390/CommonIO | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/Documentation/s390/CommonIO b/Documentation/s390/CommonIO index d378cba66456..d90a5ddb2b07 100644 --- a/Documentation/s390/CommonIO +++ b/Documentation/s390/CommonIO @@ -8,9 +8,9 @@ Command line parameters Enable logging of debug information in case of ccw device timeouts. -* cio_ignore = {all} | - {<device> | <range of devices>} | - {!<device> | !<range of devices>} +* cio_ignore = device[,device[,..]] + + device := {all | [!]ipldev | [!]<devno> | [!]<devno>-<devno>} The given devices will be ignored by the common I/O-layer; no detection and device sensing will be done on any of those devices. The subchannel to @@ -24,9 +24,10 @@ Command line parameters device numbers (0xabcd or abcd, for 2.4 backward compatibility). If you give a device number 0xabcd, it will be interpreted as 0.0.abcd. - You can use the 'all' keyword to ignore all devices. - The '!' operator will cause the I/O-layer to _not_ ignore a device. - The command line is parsed from left to right. + You can use the 'all' keyword to ignore all devices. The 'ipldev' keyword can + be used to refer to the CCW based boot device (this is probably useful only + when combined with the '!' operator). The '!' operator will cause the I/O-layer + to _not_ ignore a device. The command line is parsed from left to right. For example, cio_ignore=0.0.0023-0.0.0042,0.0.4711 |