Interesting! I'll give that a shot!
> Date: Tue, 29 Mar 2011 10:59:21 -0700 > From: [email protected] > Subject: Re: Problems With cpuplugd Evaluating Expressions in > MEMPLUG/MEMUNPLUG Rules > To: [email protected] > > Mark, > > In the meantime, How about letting bash do the arithmetic as a > workaround ... > > # MEMUNPLUG="(freemem> $[256/2*2] )" > # echo $MEMUNPLUG > (freemem> 256) > # MEMUNPLUG="(freemem> $[256/2/2] )" > # echo $MEMUNPLUG > (freemem> 64) > # MEMUNPLUG="(freemem> $[(256/2)*2] )" > # echo $MEMUNPLUG > (freemem> 256) > > > ________________________ > > Mike O'Reilly > IBM Linux Change Team > > > > > > > > > > > > _____________ > > > > > > > Gerald Schaefer > <gerald.schaefer@ > de.ibm.com> To > Sent by: Linux on [email protected] > 390 Port cc > <[email protected] > ist.edu> Subject > Re: Problems With cpuplugd > Evaluating Expressions in > 03/29/2011 10:37 MEMPLUG/MEMUNPLUG Rules > AM > > > Please respond to > gerald.schaefer@d > e.ibm.com > > > > > > > Hi Mark, > > thanks for the report, it turned out that multiplication is currently > broken in the cpuplugd on all distributions, which leads to the behaviour > that you noticed. We will release a fixed version with the next s390-tools > update on developerWorks and submit patches for the distributions. In the > meantime, the only way I see for doing correct multiplications in cpuplugd > rules is to use inverse division instead. > > Regards, > Gerald Schaefer > > Linux on System z Development > IBM Deutschland Research & Development GmbH > Vorsitzender des Aufsichtsrats: Martin Jetter > Geschäftsführung: Dirk Wittkopp > Sitz der Gesellschaft: Böblingen > Registergericht: Amtsgericht Stuttgart, HRB 243294 > > > On 29.03.2011 15:08, Mark Wheeler wrote: > > Greetings all, > > > > I'm running cpuplugd (Linux on System z CPU hotplug daemon version > 1.8.1-8.el5) and am having problems getting it to evaluate expressions > correctly. > > In order to better see what was happenning, I reduced it down to a couple > very simple cases: > > 1) MEMUNPLUG="(freemem> 256/2*2)" > > Trims freemem down to 64 MB > > 2) MEMUNPLUG="(freemem> 256/2/2)" > > Trims freemem down to 64 MB > > 3) MEMUNPLUG="(freemem> (256/2)*2)" > > Trims freemem down to 64 MB > > 4) MEMUNPLUG="(freemem> 256/(2/2)" > > Trims freemem down to 256 MB > > > > Only 2) and 4) perform as expected. > > > > Has anyone else seen this? Is able to reproduce? Show me the error of my > ways? > > > > This is on RHEL 5.5 2.6.18-194.3.1.el5. > > > > Mark Wheeler > > UnitedHealth Group > > > > -- > > > > "Excellence. Always. If Not Excellence, What? If Not Excellence Now, > When?" > > Tom Peters, author of "The Little BIG Things" > > > > > > > > > > ---------------------------------------------------------------------- > > 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 more information on Linux on System z, visit > > http://wiki.linuxvm.org/ > > ---------------------------------------------------------------------- > 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 more information on Linux on System z, visit > http://wiki.linuxvm.org/ > > ---------------------------------------------------------------------- > 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 more information on Linux on System z, visit > http://wiki.linuxvm.org/ ---------------------------------------------------------------------- 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 more information on Linux on System z, visit http://wiki.linuxvm.org/
