Re: [BUG] sysfs cpu?/topology is empty in 2.6.25 (32-bit Intel system)

[Ingo Molnar <mingo@elte.hu>]

* Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> wrote:

> System topology on intel based system needs to be exported for 
> non-numa case as well.
> 
> All parts of asm-i386/topology.h has come under 
> #ifdef CONFIG_NUMA after the merge to asm-x86/topology.h
> 
> /sys/devices/system/cpu/cpu?/topology/* is populated based on 
> ENABLE_TOPO_DEFINES
> 
> The sysfs cpu topology is not being populated on my dual socket
> dual core xeon 5160 processor based (x86 32 bit) system.
> 
> CONFIG_NUMA is not set in my case yet the topology is relevant
> and useful.
> 
> irqbalance daemon application depends on topology to build the cpus 
> and package list and it fails on Fedora9 beta since the sysfs topology 
> was not being populated in the 2.6.25 kernel.
> 
> I am not sure if it was intentional to not define ENABLE_TOPO_DEFINES 
> for non-numa systems.
> 
> This fix has been tested on the above mentioned dual core, dual socket
> system.

applied, thanks Vaidyanathan.

This was certainly not intentional - i suspect nobody noticed that 
irqbalanced was working without proper topology information?

	Ingo