Re: DEBUG_PAGEALLOC & SMP?

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxx> wrote:

> > full log attached below. (ob'fun: the oom-killer picked the migration 
> > thread to kill ;)
> 
> this was with the -RT tree - let me try whether the same happens on 
> vanilla 2.6.12 too.

[ 1 hour later ... ] the mystery is solved: i had a ~15 MB kernel image 
size due to various debugging options plus per-CPU tracing buffer at 
NR_CPUS=8. PAGEALLOC caused an extra +1MB of DMA-zone kernel footprint 
(the 4k granular kernel pagetables of 1 GB physical RAM), which was the 
final drop and depleted the DMA pool completely.

	Ingo
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