From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with ESMTP id 75DE18D0040 for ; Thu, 24 Mar 2011 15:03:26 -0400 (EDT) Received: by gxk23 with SMTP id 23so165609gxk.14 for ; Thu, 24 Mar 2011 12:03:24 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20110324185903.GA30510@elte.hu> References: <20110324172653.GA28507@elte.hu> <1300990853.3747.189.camel@edumazet-laptop> <20110324185903.GA30510@elte.hu> Date: Thu, 24 Mar 2011 21:03:24 +0200 Message-ID: Subject: Re: [GIT PULL] SLAB changes for v2.6.39-rc1 From: Pekka Enberg Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: Ingo Molnar Cc: Christoph Lameter , Eric Dumazet , 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 On Thu, Mar 24, 2011 at 8:59 PM, Ingo Molnar wrote: > > * Pekka Enberg wrote: > >> On Thu, Mar 24, 2011 at 8:47 PM, Christoph Lameter wrote: >> > >> > On Thu, 24 Mar 2011, Eric Dumazet wrote: >> > >> >> > this_cpu_cmpxchg16b_emu: >> >> > =A0 =A0 =A0 =A0 pushf >> >> > =A0 =A0 =A0 =A0 cli >> >> > >> >> > =A0 =A0 =A0 =A0 cmpq %gs:(%rsi), %rax >> > >> >> Random guess >> >> >> >> Masking interrupts, and accessing vmalloc() based memory for the firs= t >> >> 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. >> >> Btw, I tried Ingo's .config and it doesn't boot here so it's somehow >> .config related. > > did you get a similar early crash as i? I'd not expect my .config to have= all > the drivers that are needed on your box. It hanged here which is pretty much expected on this box if kmem_cache_init() oopses. I'm now trying to see if I'm able to find the config option that breaks things. CONFIG_PREEMPT_NONE is a suspect: penberg@tiger:~/linux$ grep PREEMPT ../config-ingo # CONFIG_PREEMPT_RCU is not set CONFIG_PREEMPT_NONE=3Dy # CONFIG_PREEMPT_VOLUNTARY is not set # CONFIG_PREEMPT is not set -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org