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re: pegasosII hung with new kernel - page daemon spinning
> On 09/23/2012 12:51 AM, matthew green wrote:
> > with some help from chuq@ we've narrowed this down to the
> > kmem_arena being under 10% empty:
> > db> call uvm_km_va_starved_p 1
> > which keeps the main loop from sleeping. but why this is full and
> > not being fixed by the page daemon isn't a mystery.
> > .mrg.
> That's interessting what size does the arena have on the system with
> 512mb? Probably limited by NKMEMPAGES_MAX_DEFAULT, so it might need to
> be larger on those.
arch/powerpc/include/param.h:113:#define NKMEMPAGES_MAX_DEFAULT ((128 *
1024 * 1024) >> PAGE_SHIFT)
is in action here. ddb tells me:
db> call vmem_size(*kmem_arena, 3) # VMEM_FREE|VMEM_ALLOC
8000000 # 128MB
db> call vmem_size(*kmem_arena, 2) # VMEM_FREE
what do you suggest? increasing NKMEMPAGES_MAX_DEFAULT?
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