diff options
| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2006-07-27 14:00:23 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-07-27 14:00:23 +0200 |
| commit | ba4ba8a69dcb446450b5ddeca48a7bd15783f4c2 (patch) | |
| tree | e923e6f55126c25b2411462748435ca882bf0027 /mm | |
| parent | 64821324ca49f24be1a66f2f432108f96a24e596 (diff) | |
[S390] permanent subchannel busy conditions may cause I/O stall
In special conditions where a subchannel rejects the HALT I/O-
instruction with a busy indication (cc 2), I/O may stall.
I/O request termination logic retries HALT I/O indefinitely
because it expects HALT I/O to alter the subchannel status which
is not true when cc 2 is returned.
In case of a busy indication, try CLEAR I/O instruction immediately.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions