Mark, The landscape of servers having this problem is SLES10. (And due to a number of unfortunate events, still SP3). The latest event being... We put the .95 (SP4) kernel into the developers QA system that belongs to this landscape and almost immediately ran into the ksoftirq problem. IBM has issued a PTF for the .95 kernel and we are watching to see if it is stable, If it is we start rolling out the .95 kernel into our production servers in this landscape.
Thanks for the info about the .95 patch level. This lets us know that the .95 kernel will fix at least two of our problems. Ron ________________________________________ From: Linux on 390 Port [LINUX-390@VM.MARIST.EDU] On Behalf Of Mark Post [mp...@novell.com] Sent: Thursday, February 23, 2012 1:40 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Does cpuplugd use the cpu hot plug interface? >>> On 2/22/2012 at 11:22 PM, Ron Foster at Baldor-IS <rfos...@baldor.com> >>> wrote: > Hello listers, > We are experiencing a problem where occasionally we get some uninterruptable > processes that appear to hang. > We use CPUPLUGD. > -snip- > I found this hit that might be related: > > http://git390.marist.edu/cgi-bin/gitweb.cgi?p=linux-2.6.git;a=commit;h=f2db2e6 > cb3f5f766cbb3788af44705685ff2445a > -snip- > Does CPUPLUGD use this mechanism? I think it would have to use it. > Could this be be our problem? It could be. You don't say what version you're seeing this on, but I see the patch for this mentioned in the changelog for kernel-default-2.6.32.54-0.3.1.s390x.rpm on SLES11 SP1 and kernel-default-2.6.16.60-0.95.1 on SLES10 SP4. patches.arch/s390-34-01-pfault-cpu-hotplug.patch and patches.arch/s390-60-01-pfault-cpu-hotplug.patch respectively. Mark Post ---------------------------------------------------------------------- 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/ ---------------------------------------------------------------------- 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/
