Re: [RFC PATCH] powerpc/numa: add ability to disable and debug topology updates

2014-09-16 Thread Nathan Fontenot
On 09/09/2014 03:09 PM, Nishanth Aravamudan wrote: We have hit a few customer issues with the topology update code (VPHN and PRRN). It would be nice to be able to debug the notifications coming from the hypervisor in both cases to the LPAR, as well as to disable reacting to the

Re: [RFC PATCH] powerpc/numa: add ability to disable and debug topology updates

2014-09-16 Thread Nishanth Aravamudan
On 16.09.2014 [14:42:20 -0500], Nathan Fontenot wrote: On 09/09/2014 03:09 PM, Nishanth Aravamudan wrote: We have hit a few customer issues with the topology update code (VPHN and PRRN). It would be nice to be able to debug the notifications coming from the hypervisor in both cases to

Re: [RFC PATCH] powerpc/numa: add ability to disable and debug topology updates

2014-09-16 Thread Michael Ellerman
On Mon, 2014-09-15 at 16:54 -0700, Nishanth Aravamudan wrote: On 15.09.2014 [15:05:36 +1000], Michael Ellerman wrote: On Tue, 2014-09-09 at 13:09 -0700, Nishanth Aravamudan wrote: Does it really need to be a boot param, or could it be a debugfs or sysctl flag? ie. do we need to disable it

Re: [RFC PATCH] powerpc/numa: add ability to disable and debug topology updates

2014-09-15 Thread Nishanth Aravamudan
Hi Michael, On 15.09.2014 [15:05:36 +1000], Michael Ellerman wrote: On Tue, 2014-09-09 at 13:09 -0700, Nishanth Aravamudan wrote: We have hit a few customer issues with the topology update code (VPHN and PRRN). It would be nice to be able to debug the notifications coming from the

Re: [RFC PATCH] powerpc/numa: add ability to disable and debug topology updates

2014-09-14 Thread Michael Ellerman
On Tue, 2014-09-09 at 13:09 -0700, Nishanth Aravamudan wrote: We have hit a few customer issues with the topology update code (VPHN and PRRN). It would be nice to be able to debug the notifications coming from the hypervisor in both cases to the LPAR, as well as to disable reacting to the

[RFC PATCH] powerpc/numa: add ability to disable and debug topology updates

2014-09-09 Thread Nishanth Aravamudan
We have hit a few customer issues with the topology update code (VPHN and PRRN). It would be nice to be able to debug the notifications coming from the hypervisor in both cases to the LPAR, as well as to disable reacting to the notifications, to narrow down the source of the problems. Add a basic