On 06.05.15 09:52, Gene Heskett wrote: > I do not know if the isolcpus=1 command was in the > old /boot/grub/grub.cfg, but after running update-grub, its gone!
Gene, Oops - I'd forgotten our "Beating Grub2 into submission" discussion in 2011, and been thinking in terms of the general case, where adding/editing: GRUB_CMDLINE_LINUX="isolcpus=1" in /etc/default/grub should do the trick, or you could use GRUB_CMDLINE_LINUX_DEFAULT there instead, then the second (recovery) menu item normally generated will not have isolcpus=1. Keeping a recovery option as simple as possible seems a cautious principle to me. BUT on finding: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?The_Isolcpus_Boot_Parameter_And_GRUB2 I'm reminded that some LinuxCNC users have not wanted isolcpus=1 added to the kernel line for all menu options, and so the link describes Kent's custom /etc/grub.d/07_rtai which only adds it where needed. Do you have it? > Has some grub related update overridden that option, or is it now > compiled into 2.6.32-122-rtai kernel? That may well explain a lot! The discussion has also slipped your memory, it seems. Google too. It doesn't want to give hits in list archives any more, apparently, because neither the above subject line, nor "Message-ID: <4d9e8496.9070...@erols.com>" (Kent's 07_rtai fix anouncement) are worth its notice. And although the search at www.linuxcnc.org has been said to search the mailing list, it doesn't work for me either, so I can't furnish a link. :( All that said, for a quick one-off fix, you could just hand edit /boot/grub/grub.cfg to add the isolcpus=1 to the "linux /boot/vmlinuz .." line for rtai. Erik -- Chinese Proverb: The more things change, the more they remain the same. ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
