Messages in this thread | | | From | Ingo Oeser <> | Subject | Re: Inquiry: Should we remove "isolcpus= kernel boot option? (may have realtime uses) | Date | Tue, 3 Jun 2008 00:35:55 +0200 |
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Hi Paul,
in short: NAK!
On Monday 02 June 2008, Paul Jackson wrote: > (Aside to the RealTime folks -- is there a 'realtime' > email list which I should include in this discussion?) > > The kernel has a "isolcpus=" kernel boot time parameter. This > parameter isolates CPUs from scheduler load balancing, minimizing the > impact of scheduler latencies on realtime tasks running on those CPUs.
I used it to mask out a defect CPU on a 8-CPU node of a HPC-cluster at a customer site, until the $BIG_VENDOR sent a replacement. And to prove $BIG_VENDOR, that we actually have a problem on THAT CPU.
So I would really like to keep this fault isolation capability. I made my customer happy with that.
I wish Linux had more such "mask out bad hardware" features to faciliate fault isolation and boot and runtime.
Best Regards
Ingo Oeser
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