Re: Memory corruption & SCSI in 2.6.15

[Linus Torvalds]

[ 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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