I should have mentioned that Collaborative Memory Management requires tha t it be supported by the kernel. For example, SLES 9 does not, whereas SLE S 10 does.
Brian Nielsen On Tue, 11 Dec 2007 09:38:30 -0600, Brian Nielsen <[EMAIL PROTECTED] > wrote: >Cooperative Memory Management and Collaborative Memory Management are >different things. > >Cooperative Memory Management does indeed need the CMM module loaded in >Linux, whereas Collaborative Memory Management does not. > >Q MEMASSIST is telling you the status of Collaborative Memory >Management. "ACTIVE" in the response tells you that the Linux guest has >issued the ESSA instruction, which is how Collaboratie Memory Management >is implemented. "SIMULATED" in the response tells you that the assist i s >not installed on the hardware and that it is being simulated by CP. > >Brian Nielsen > > >On Tue, 11 Dec 2007 17:31:21 +0930, Fred Schmidt <[EMAIL PROTECTED] > >wrote: > >>Hi, >> >>I'm having a play with VMRM Cooperative Memory Management, now I have z/VM >>5.3 and SLES 10.1 installed. However, I'm not sure that it is working >>correctly. >> >>From z/VM, I see.... >> >> q memassist for user vmlxtst5 >>ALL USERS SET - ON >> >>USER SETTING STATUS >>VMLXTST5 ON ACTIVE,SIMULATED >> >>... with the "SIMULATED" meaning that assist is not installed, but is >>being simulated by CP, according to the HELP info. I take that to mean >>that Linux is not set up correctly. Or am I barking up the wrong tree >>here? >> >> >>From Linux, I have specified the following in /etc/zipl.conf and run zi pl >>-V .... >> >> parameters = "dasd=150-15F root=/dev/dasda1 cmm.sender=VMRM SVM >>TERM=dumb" >> >>I have also issued... >> >>modprobe cmm sender=VMRMSVM >> >>... and lsmod confirms that cmm is loaded. >> >>cat /proc/sys/vm/cmm_pages shows values that match those recorded in >>VMRMSVM's log file for the SMSG entries for the same time period, so it >>seems that z/VM is telling Linux to reduce memory. >> >>But is Linux taking any notice? How do I confirm that it is? I don't s ee >>any corresponding reduction in memory usage using top in Linux, or PERFKIT >>in z/VM. >> >>Regards, >>Fred Schmidt >>Department of Corporate and Information Services (DCIS) >>Data Centre Services (DCS) >>Northern Territory Government, Australia >======================== ========================= =======================
