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 SMTP id 0890A8D0040 for ; Thu, 24 Mar 2011 14:01:56 -0400 (EDT) Date: Thu, 24 Mar 2011 13:01:50 -0500 (CDT) From: Christoph Lameter Subject: Re: [GIT PULL] SLAB changes for v2.6.39-rc1 In-Reply-To: Message-ID: References: <20110324142146.GA11682@elte.hu> <20110324172653.GA28507@elte.hu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Pekka Enberg Cc: Ingo Molnar , 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, 24 Mar 2011, Pekka Enberg wrote: > On Thu, Mar 24, 2011 at 7:43 PM, Christoph Lameter wrote: > > The bug should only trigger on old AMD64 boxes that do not support > > cmpxchg16b. > > Yup. Ingo is it possible to see /proc/cpuinfo of one of the affected > boxes? I'll try your config but I'm pretty sure the problem doesn't > trigger here. Like I said, I think the problem is that alternative > instructions are not patched early enough for cmpxchg16b emulation to > work for kmem_cache_init(). I tried my check_bugs() patch but it hangs > during boot. I'll see if I can cook up a patch that does > alternative_instructions() before kmem_cache_init() because I think > those *should* be available during boot too. I forced the fallback to the _emu function to occur but could not trigger the bug in kvm. -- 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