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Re: Inquiry: Should we remove "isolcpus= kernel boot option? (may have realtime uses)
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From: Andi Kleen
Subject:
Re: Inquiry: Should we remove "isolcpus= kernel boot option? (may have realtime uses)
Date: Wednesday, June 4, 2008 - 1:03 pm
> We (SGI) routinely handle that need with a custom init program,
quoted text
> invoked with the init= parameter to the booting kernel, which > sets up cpusets and then invokes the normal (real) init program > in a cpuset configured to exclude those CPUs and nodes which we > want to remain unloaded. For example, on a 256 CPU, 64 node > system, we might have init running on a single node of 4 CPUs, > and leave the remaining 63 nodes and 252 CPUs isolated from all > the usual user level daemons started by init. > > There is no need for additional kernel changes to accomplish this.
There are no additional changes needed, but you must admit that isolcpus is a much more elegant solutation for this problem than hijacking init. -Andi --
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Messages in current thread:
Inquiry: Should we remove "isolcpus= kernel boot option? ( ...
, Paul Jackson
, (Sun Jun 1, 7:30 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Dimitri Sivanich
, (Mon Jun 2, 9:42 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Mon Jun 2, 11:39 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Dimitri Sivanich
, (Mon Jun 2, 2:41 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Mon Jun 2, 2:59 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Ingo Oeser
, (Mon Jun 2, 3:35 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Peter Zijlstra
, (Mon Jun 2, 3:45 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Mon Jun 2, 4:04 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Ingo Oeser
, (Mon Jun 2, 4:55 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Mon Jun 2, 8:32 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Nick Piggin
, (Mon Jun 2, 11:03 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Dimitri Sivanich
, (Tue Jun 3, 7:40 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyanskiy
, (Tue Jun 3, 10:57 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyanskiy
, (Tue Jun 3, 4:47 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Tue Jun 3, 5:41 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Nick Piggin
, (Tue Jun 3, 6:18 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Tue Jun 3, 8:00 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Tue Jun 3, 9:32 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Tue Jun 3, 9:47 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Mark Hounschell
, (Wed Jun 4, 2:58 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Andi Kleen
, (Wed Jun 4, 5:18 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Dimitri Sivanich
, (Wed Jun 4, 7:00 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Ingo Oeser
, (Wed Jun 4, 9:18 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 10:26 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 10:41 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 10:47 am)
Stop machine threads are getting preemted by the rt period ...
, Max Krasnyansky
, (Wed Jun 4, 11:07 am)
Re: Stop machine threads are getting preemted by the rt pe ...
, Peter Zijlstra
, (Wed Jun 4, 11:18 am)
Re: Stop machine threads are getting preemted by the rt pe ...
, Max Krasnyansky
, (Wed Jun 4, 11:24 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 11:29 am)
Re: Stop machine threads are getting preemted by the rt pe ...
, Peter Zijlstra
, (Wed Jun 4, 11:55 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Peter Zijlstra
, (Wed Jun 4, 11:56 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 11:58 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 12:26 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 12:31 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 12:34 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 12:37 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 12:45 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Andi Kleen
, (Wed Jun 4, 1:03 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Andi Kleen
, (Wed Jun 4, 1:05 pm)
Re: Stop machine threads are getting preemted by the rt pe ...
, Max Krasnyansky
, (Wed Jun 4, 1:14 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 1:16 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 1:23 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Peter Zijlstra
, (Wed Jun 4, 1:25 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Andi Kleen
, (Wed Jun 4, 1:33 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 1:38 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Mark Hounschell
, (Wed Jun 4, 2:00 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 2:03 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 2:16 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 2:17 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyansky
, (Wed Jun 4, 2:20 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Paul Jackson
, (Wed Jun 4, 2:26 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Michael Trimarchi
, (Wed Jun 4, 2:44 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Peter Zijlstra
, (Wed Jun 4, 2:52 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Michael Trimarchi
, (Thu Jun 5, 4:16 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Mark Hounschell
, (Thu Jun 5, 4:44 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Peter Zijlstra
, (Thu Jun 5, 5:07 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Michael Trimarchi
, (Thu Jun 5, 7:57 am)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, Max Krasnyanskiy
, (Fri Jun 6, 3:28 pm)
Re: Inquiry: Should we remove "isolcpus= kernel boot optio ...
, GeunSik Lim
, (Thu May 7, 7:48 pm)
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