Re: [PATCH 0/4] CPU hotplug, cpusets: Fix CPU online handlingrelated to cpusets

[Ingo Molnar]

* Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx> wrote:

> IOW, consider:
> 
> cpuset A has 0-10
> 
> - Take CPU 10 offline
>   [We are forced to remove CPU 10 from cpuset A, which becomes 0-9 now]
> 
> 
>    <Userspace didn't request any change to cpuset A>
> 
> 
> - Bring back CPU 10 online
> 
> Now cpuset A is still 0-9! IMO, it should have been 0-10.

Why is CPU 10 taken out of the cpuset to begin with?

The cpuset code should be fixed to work with offline CPUs as 
well - it can obviously not schedule to them, but otherwise it 
should be fine to have a wider cpuset than the hw can support.

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/