From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id DA50B8D0040 for ; Thu, 24 Mar 2011 13:27:01 -0400 (EDT) Date: Thu, 24 Mar 2011 18:26:53 +0100 From: Ingo Molnar Subject: Re: [GIT PULL] SLAB changes for v2.6.39-rc1 Message-ID: <20110324172653.GA28507@elte.hu> References: <20110324142146.GA11682@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Pekka Enberg Cc: Christoph Lameter , 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 * Pekka Enberg wrote: > On Thu, Mar 24, 2011 at 4:41 PM, Christoph Lameter wrote: > > On Thu, 24 Mar 2011, Ingo Molnar wrote: > > > >> FYI, some sort of boot crash has snuck upstream in the last 24 hours: > >> > >> BUG: unable to handle kernel paging request at ffff87ffc147e020 > >> IP: [] this_cpu_cmpxchg16b_emu+0x2/0x1c > > > > Hmmm.. This is the fallback code for the case that the processor does not > > support cmpxchg16b. > > How does alternative_io() work? Does it require > alternative_instructions() to be executed. If so, the fallback code > won't be active when we enter kmem_cache_init(). Is there any reason > check_bugs() is called so late during boot? Can we do something like > the totally untested attached patch? Does the config i sent you boot on your box? I think the bug is pretty generic and should trigger on any box. Thanks, Ingo -- 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