I see this info in the doc for the latest kernel update:
spin_retry Kernel parameter With this update an additional kernel-command line parameter is provided. The default value is 0 for this parameter. Setting this parameter to 1000 has shown for most workloads on a linux runnig under z/VM that the number of DIAG 44 calls is significant reduced. Is this only related to multiple virtual CPUs or does it apply to any workload? Has the performance impact of this change been measured? If so, what is it? I'll guess that theres a proc filesystem entry to check the value, what is it? -- Rich Smrcina VM Assist, Inc. Phone: 414-491-6001 Ans Service: 360-715-2467 rich.smrcina at vmassist.com Catch the WAVV! http://www.wavv.org WAVV 2007 - Green Bay, WI - May 18-22, 2007 ---------------------------------------------------------------------- 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
