linux-kernel - Re: [S+Q3 00/23] SLUB: The Unified slab allocator (V3)

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Message-ID: <alpine.DEB.2.00.1008050136340.30889@chino.kir.corp.google.com>
Date:	Thu, 5 Aug 2010 01:38:15 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
cc:	Pekka Enberg <penberg@...helsinki.fi>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Nick Piggin <npiggin@...e.de>
Subject: Re: [S+Q3 00/23] SLUB: The Unified slab allocator (V3)

On Wed, 4 Aug 2010, Christoph Lameter wrote:

> > This insta-reboots on my netperf benchmarking servers (but works with
> > numa=off), so I'll have to wait until I can hook up a serial before
> > benchmarking this series.
> 
> There are potential issues with
> 
> 1. The size of per cpu reservation on bootup and the new percpu code that
> allows allocations for per cpu areas during bootup. Sometime I wonder if I
> should just go back to static allocs for that.
> 
> 2. The topology information provided by the machine for the cache setup.
> 
> 3. My code of course.
> 

I bisected this to patch 8 but still don't have a bootlog.  I'm assuming 
in the meantime that something is kmallocing DMA memory on this machine 
prior to kmem_cache_init_late() and get_slab() is returning a NULL 
pointer.
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