Messages in this thread | | | Date | Thu, 15 May 2008 23:28:26 +0530 | From | Vaidyanathan Srinivasan <> | Subject | Re: [BUG] sysfs cpu?/topology is empty in 2.6.25 (32-bit Intel system) |
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* Ingo Molnar <mingo@elte.hu> [2008-05-06 14:04:36]:
> > * 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?
Hi Ingo,
Thank you for pushing the patch to 2.6.25-rc2. I have tested 2.6.26-rc2 for correct topology information and parsing by irqbalance daemon in the following system configurations:
32-bit Two socket dual core xeon 5160 processor system 32-bit Two socket quad core xeon E5450 processor system
--Vaidy
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