Re: [patch 0/7] [RFC] SLUB: Improve allocpercpu to reduce per cpu access overhead

[David Miller <davem@davemloft.net>]

From: Christoph Lameter <clameter@sgi.com>
Date: Wed, 31 Oct 2007 18:21:02 -0700 (PDT)

> On Wed, 31 Oct 2007, David Miller wrote:
> 
> > From: Christoph Lameter <clameter@sgi.com>
> > Date: Wed, 31 Oct 2007 18:12:11 -0700 (PDT)
> > 
> > > On Wed, 31 Oct 2007, David Miller wrote:
> > > 
> > > > All I can do now is bisect and then try to figure out what about the
> > > > guilty change might cause the problem.
> > > 
> > > Reverting the 7th patch should avoid using the sparc register that caches 
> > > the per cpu area offset? (I though so, does it?)
> > 
> > Yes, that's right, %g5 holds the local cpu's per-cpu offset.
> 
> And if I add the address of a percpu variable then I get to the variable 
> for this cpu right?

Right.

I bisected the crash down to:

	[PATCH] newallocpercpu
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/