On Wednesday 06 May 2015 11:34:02 Erik Christiansen wrote: > 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_A >nd_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?
Yes, on both machines. Didn't work on the lathes machine. Added it by hand to grub.cfg. Drive turned into instantly uncheckable. No superblock found. So the drive is now in my QC cage as /dev/sdb1, gparted says the partition table is valid, so I just did a mke4fs on both patitions. The fresh copy of the binary.hybrid.iso I just downloaded, has now been burned to a dvd. How can I tell the installer to just use what it finds? But my remark about the drive stands, this SOB was never sold in the US or latin America, so Toshiba will not supply any firmware updates the drive might be badly in need of. Howinhell can we protect ourselves from unscrupulous vendors who by drives in 10,000 lots from some rickshaw driver in Kowloon? Methnks a trip to Staples might be in order, but they are as bad as newegg in this regard. If the binary.hybrid install won't fly, thats next, looking for an SSD. Back later, headed for shop with drive & dvd in hand. > > 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 Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ 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
