On 27 January 2015 at 20:36, Rafael J. Wysocki rjw@rjwysocki.net wrote:
OK, and this is the last one I'm going to consider for 3.20 (in case you have more of them queued up somewhere).
Okay..
To make things simple we stop playing with sysfs files unless the driver is getting removed.
And uses will see CPUs that are not present any more?
s/uses/users ?
Actually I have never seen such a situation on the ARM world and so don't know what exactly happens here. You are probably talking about the NUMA server space, where a cluster of CPUs can be removed physically from the NUMA network of CPUs.
What actually happens in that case? Similar to echo 0 > online ? And do we support it currently?
FWIW, I haven't paid any attention to side of the problem yet, but as soon as I understand it, I can fix it. Any tips on how can I emulate that on platforms where we can't take out the CPUs physically ?