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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2010-02-26 22:37:25 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-02-26 22:37:29 +0100 |
| commit | 879acca58a904c25487c89ab11e23eb556fb13d3 (patch) | |
| tree | 6b645121090442eb74807ad8388f9986b551def3 /Documentation/s390 | |
| parent | be5d3823f29c09676abd2eeea4f9767bc4a1a531 (diff) | |
| download | lwn-879acca58a904c25487c89ab11e23eb556fb13d3.tar.gz lwn-879acca58a904c25487c89ab11e23eb556fb13d3.zip | |
[S390] cio: introduce cio_settle
This patch introduces a proc file cio_settle. A write request to
this file is blocked until all queued cio actions are handled.
This will allow userspace to wait for pending work affecting
device availability after changing cio_ignore or the hardware
configuration.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'Documentation/s390')
| -rw-r--r-- | Documentation/s390/CommonIO | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/s390/CommonIO b/Documentation/s390/CommonIO index 339207d11d95..d378cba66456 100644 --- a/Documentation/s390/CommonIO +++ b/Documentation/s390/CommonIO @@ -87,6 +87,12 @@ Command line parameters compatibility, by the device number in hexadecimal (0xabcd or abcd). Device numbers given as 0xabcd will be interpreted as 0.0.abcd. +* /proc/cio_settle + + A write request to this file is blocked until all queued cio actions are + handled. This will allow userspace to wait for pending work affecting + device availability after changing cio_ignore or the hardware configuration. + * For some of the information present in the /proc filesystem in 2.4 (namely, /proc/subchannels and /proc/chpids), see driver-model.txt. Information formerly in /proc/irq_count is now in /proc/interrupts. |