Date: Thu, 24 Mar 2011 13:47:23 -0500 (CDT)
From: Christoph Lameter <cl@linux.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
cc: Pekka Enberg <penberg@kernel.org>, Ingo Molnar <mingo@elte.hu>,
        torvalds@linux-foundation.org, akpm@linux-foundation.org,
        tj@kernel.org, npiggin@kernel.dk, rientjes@google.com,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [GIT PULL] SLAB changes for v2.6.39-rc1
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On Thu, 24 Mar 2011, Eric Dumazet wrote:

> > this_cpu_cmpxchg16b_emu:
> >         pushf
> >         cli
> >
> >         cmpq %gs:(%rsi), %rax

> Random guess
>
> Masking interrupts, and accessing vmalloc() based memory for the first
> time ?

Hmmm.. Could be. KVM would not really disable interrupts so this may
explain that the test case works here.

Simple fix would be to do a load before the cli I guess.

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