Re: [BUG] x86: bootmem broken on SGI UV

[Robin Holt <holt@sgi.com>]

On Sun, Oct 10, 2010 at 12:43:19PM +0200, Ingo Molnar wrote:
> 
> * Ingo Molnar <mingo@elte.hu> wrote:
> 
> > 
> > * Robin Holt <holt@sgi.com> wrote:
> > 
> > > On Sat, Oct 09, 2010 at 07:59:45AM -0500, Russ Anderson wrote:
> > > > Yes, Yinghai's patch fixes the problem.
> > > > Thank you very much.
> > > 
> > > Will this be included in 2.6.36?  It is needed for boot in order for UV
> > > systems to boot.
> > 
> > -tip uses memblock APIs. If this happens with vanilla -git as well 
> > then we need a bootmem backport for the fix.
> 
> And to answer your question: yes, we can queue it up for -final as well 
> if it's a recent regression - 'doesnt boot at all' bugs are nasty. But 
> i'm not sure this is a bootmem problem so please double check vanilla 
> v2.6.36-rc7 as well.

The 36-rc7 kernel does not boot at all either.  I don't have any decent
debug tools to dig in further.  It does fail on the same machine that
Russ was testing with, but passes on any that have a single blade as
the kernel Russ first identified as being a problem had.  Based upon my
vague recollection of the boot messages, it appears to fail in a similar
point in boot.  I would assume it is a similar problem.

Thanks,
Robin