Re: 32/64-bit NUMA consolidation behavior regresion

2012-11-30 Thread Dave Hansen
On 11/30/2012 12:42 PM, Tejun Heo wrote: > On Wed, Nov 28, 2012 at 04:03:58PM -0800, Dave Hansen wrote: >> My system is just qemu booted with: >> >> -smp 8 -m 8192 -numa node,nodeid=0,cpus=0-3 -numa node,nodeid=1,cpus=4-7 >> >> Watch the "PERCPU:" line early in boot, and you can see the "Embedded"

Re: 32/64-bit NUMA consolidation behavior regresion

2012-11-30 Thread Tejun Heo
Hello, Dave. On Wed, Nov 28, 2012 at 04:03:58PM -0800, Dave Hansen wrote: > My system is just qemu booted with: > > -smp 8 -m 8192 -numa node,nodeid=0,cpus=0-3 -numa node,nodeid=1,cpus=4-7 > > Watch the "PERCPU:" line early in boot, and you can see the "Embedded" > come and go with or without yo

32/64-bit NUMA consolidation behavior regresion

2012-11-28 Thread Dave Hansen
Hi Tejun, I was bisecting a boot problem on a 32-bit NUMA kernel and it bisected down to commit 8db78cc4. It turns out that, with this patch, pcpu_need_numa() changed its return value on my system from 1 to 0. What that basically meant was that we stopped using the remapped lowmem areas for percp