Re: Memory corruption & SCSI in 2.6.15

[Benjamin Herrenschmidt]

On Mon, 2005-12-12 at 12:51 -0800, Linus Torvalds wrote:
> [ I applied Brian's patch, so hopefully it was the same issue, and current 
>   git doesn't show this problem any more ]

I'll be able to test in about 1h.

> 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 ;)

Ok, I'll look into it. It's doable though it will definitely not be
fast :)

Ben.


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