Many thanks for your detail explaination everybody here. At first, I will use 4 sub-channels instead of 80 for every linux, like what Steffen and Ralph recommanded. Then check if the error occur again.
At second, I will update MCF version to latest one, like what Raymond recommanded. I will post our progress and result later. Raymond: I had talked with HW guy about collect HW logs. But he is not clear. Could you tell me what kind of logs should collected? ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/