Re: Fwd: Kernel Power management ?? turning off used devices thatare in use.

[hagar]

On 04/11/11 23:24, Joel Schopp wrote:
> > I need to be able to either switch off cpu hotpluging - or at least 
> > prevent hotplugging certain cpu's
> >
> > there should really be a mincpu's option or better a 
> > nohotplug="0,1,2,5,7,etc" option.
> >
> > It would appear that cpu1 is the default cpu for those interrupts - 
> > and they are not being transferred to cpu0 properly.
> The proper way to fix this is to find why the interrupts are not being 
> transferred and fix that.  Forcing cpus to not be hotpluggable is just 
> hiding the problem.
But it does allow the computer to become usable.
At the moment it is extremely borderline.
So much so that I would rather a non smp kernel and run off one cpu.

I have difficulty keeping the network up.
I have to run a cron job every minute to check the network and restart 
it if necessary.
Watching an hour long streaming video is impossible without moving the 
usb mouse constantly.

I am even considering a change of OS due to this problem.
> > I have tried the kernel parameters noapic nosmp maxcpus acpi=off 
> > possible_cpus=2 etc - with no success
> >
> > I did find a flaw in "possible_cpus=0" - this prevents the kernel 
> > booting (no cpus available )
> > This option should be set to a minimum of 1
> We allow users to shoot themselves in the foot if they do silly 
> things.  This is a design decision.
Quite amusing.
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