On Fri, 2 Jan 2004, Tom wrote: > On Fri, 2 Jan 2004, Oliver Brandmueller wrote: > > > to the base functionality for CPU hot swapping. One would need (apart > > from a Motherboard that's able to that ;-)) some control over CPUs now, > > like disabling a physical CPU during runtime (which could also be done > > automatically on certain filure onditions). > > sysctl already exposes some variabled to control CPUs on an SMP system. > > It is a pretty hard to detect a CPU failure in software, because the > software detection will fail at the same time the CPU does. Right. A hardware watchdog is what's required to effectively check for fail{ed,ing} cpus. With software, you're left either polling or guessing that a cpu has gone offline for hardware reasons when it doesn't run anything on its queue. > > Is there any work in progress in this direction? Would be a very neat > > feature for high availability systems. Find me a x86 motherboard (with specs, preferably) that supports cpu failure-monitoring and hot-swapping and I'll volunteer time to hack up some code for you. (We have a need for this functionality in our x86-farm at work, so I'd get to do it on the clock. :) ) Regards, > Andre Guibert de Bruet | Enterprise Software Consultant > > Silicon Landmark, LLC. | http://siliconlandmark.com/ >Received on Fri Jan 02 2004 - 09:38:51 UTC
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