Re: How to notify app of changed cpu/mem/io node configuration?

[Paul Jackson <pj@sgi.com>]

> I don't accept a lot of the cpu hotplug code as it is :).

Ah so ...

> sure beat the living daylights out of CPU0 

Eh - not the kernels problem.  If user level code, such a batch
manager, screws up the configuration and leaves a bunch of orphans
laying around, I'd just as soon cram them all into one corner.

But this is likely reflecting a difference in our target markets.

For my key customers, if a big job can't get exactly the resources it
signed up for, that job might as well be taken out behind the barn and
shot.  One of the first features these customers demand is someway to
guarantee that nothing else on the system will interfere with their key
job(s).  For such systems, misconfigured orphans should be quarantined
so as to have the least impact on any remaining healthy jobs.

I can well imagine that my customers needs are not universal.

Whatever ... probably not worth worrying about.  If the user level code
doesn't like the kernel default here, then the user level code can just
arrange it so that this line of code is almost never executed.

>  I think I was in a meeting when I sent that ...

That'll do it ;).

-- 
                          I won't rest till it's the best ...
                          Programmer, Linux Scalability
                          Paul Jackson <pj@sgi.com> 1.650.933.1373


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