[ I applied Brian's patch, so hopefully it was the same issue, and current
git doesn't show this problem any more ]
On Tue, 13 Dec 2005, Benjamin Herrenschmidt wrote:
>
> > Also, enabling DEBUG_PAGEALLOC might help, but that's not available on
> > powerpc.
>
> Remind me what is needed to get that working ? Unmapping of linear
> mapping pages ? (I suppose I could do that if I also disable using large
> pages for it).
Yes, basically you'd have to allow the kernel mapping being unmapped one
page at a time.
And yes, it's inefficient. Don't use it for performance measurements ;)
Linus
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