From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: 2.6.28-rc1: EIP: slab_destroy+0x84/0x142 From: Matt Mackall In-Reply-To: <20081025002406.GA20024@x200.localdomain> References: <20081024185952.GA18526@x200.localdomain> <1224884318.3248.54.camel@calx> <20081024220750.GA22973@x200.localdomain> <20081025002406.GA20024@x200.localdomain> Content-Type: text/plain Date: Fri, 24 Oct 2008 19:30:30 -0500 Message-Id: <1224894630.3248.77.camel@calx> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Alexey Dobriyan Cc: Christoph Lameter , Linus Torvalds , linux-mm@kvack.org, penberg@cs.helsinki.fi, akpm@linux-foundation.org List-ID: On Sat, 2008-10-25 at 04:24 +0400, Alexey Dobriyan wrote: > On Fri, Oct 24, 2008 at 06:29:47PM -0500, Christoph Lameter wrote: > > On Sat, 25 Oct 2008, Alexey Dobriyan wrote: > > > >> Fault occured at slab_destroy in KVM guest kernel. > > > > Please switch on all SLAB debug options and rerun. > > They're already on! > > New knowledge: turning off just DEBUG_PAGEALLOC makes oops dissapear, > other debugging options don't matter. It's quite possible there's a bad interaction with DEBUG_PAGEALLOC and the slab redzone logic. The first makes allocations full pages so that we can later unmap them and detect spurious writes to them while the second puts a redzone in front of the page (ie potentially in lala land). -- Mathematics is the supreme nostalgia of our time. -- 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/ . Don't email: email@kvack.org