Re: 2.6.33 pagemap endless read loop

[Mike Galbraith]

On Sun, 2010-01-10 at 13:37 +0100, Andi Kleen wrote:
> > Are you sure
> 
> I don't know if it's really endless, but it's doing a good emulation
> of it if it's not.
> 
> > 
> > On my 32bit machine, it runs for a long time, but finally exits.
> 
> That was on 64bit.
> 
> proc01 had accumulated several minutes of CPU time when I stopped it.
> 
> > From the document of pagemap, it is the mapping of all the virtual pages
> > of a process, on x86-32, it should be 4G/4K = 1024*1024 pages, also
> 
> Only the mapped ones surely?
> 
> Right now it looks like it dumps all the holes and that obviously
> will never finish on 64bit which has 47bits of address space.

Takes forever if you whack .pagemap_pte_hole too, just spends it's life
in pagemap_pte_range() instead.

start_vaddr:0x0 end_vaddr:0x7ffffffff000

Hm, zillion paces ain't a walk.

	-Mike

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