Is the DASD shared? If so, I would think that qualifies as one of those "...results will be hard to diagnose."
My thought is without z/VM your system is seeing everything available to it according to the access list and possibly the candidate list of each channel as defined in your IOCP. If you are using ESCON attached DASD could you ensure the channel(s) of your IPL device is offline to any other system identified in the IOCP (access/candidate list) for your device in question? If the DASD is shared this still won't resolve contention at the CU/device level though I can't image anything like this taking 15-20 minutes. Regards, Kevin -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Scully, William P Sent: Tuesday, August 16, 2005 9:13 AM To: LINUX-390@VM.MARIST.EDU Subject: SLES 9 in an LPAR I'm having a performance problem. I was asked to install SLES 9 64-bit into an LPAR. To create the server I got my hands on the needed DASD and conducted the install of Linux under z/VM. The virtual hardware configuration (DASD and OSA addresses) were specified as would be used on the LPAR. As usual, the installation went well. The resulting copy of Linux can be booted under z/VM in perhaps a minute or two. However when I attempt to start this copy of Linux in an LPAR (512M and one dedicated CPU in an IFL on a 2094-313), it runs so slow you might think the software was written by folks in Redmond, Washington. It takes perhaps 15-20 minutes to boot. At times it seems to be completely unresponsive, even to the directly-connected HMC "Operating System Message" panel. I've encoded the so-called kernel timer patch both enabled and disabled, to no avail. And limited the DASD the kernel is to use with a DASD=nnnn-nnnn phrase in zipl.conf. But clearly I've missed something pretty obvious. Anyone have an idea? ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
