From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by ey-out-1920.google.com with SMTP id 21so529050eyc.44 for ; Fri, 24 Oct 2008 19:50:51 -0700 (PDT) Date: Sat, 25 Oct 2008 06:54:08 +0400 From: Alexey Dobriyan Subject: Re: 2.6.28-rc1: EIP: slab_destroy+0x84/0x142 Message-ID: <20081025025408.GA27684@x200.localdomain> References: <20081024185952.GA18526@x200.localdomain> <1224884318.3248.54.camel@calx> <20081024220750.GA22973@x200.localdomain> <20081025002406.GA20024@x200.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081025002406.GA20024@x200.localdomain> Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Matt Mackall , Linus Torvalds , linux-mm@kvack.org, penberg@cs.helsinki.fi, akpm@linux-foundation.org, avi@qumranet.com List-ID: On Sat, Oct 25, 2008 at 04:24:06AM +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. Here is typical scenario: cache -- filp or dentry, ->buffer_size = 4096, objp = c643d000, dbg_redzone1 = c643df78. Unable to handle ... at c643df7c. which is not next page. Using -no-kvm switch makes this oops go away, there are strange but rare other things like half of initscripts processes decides to segfault. Dunno what is this. Same picture for different guest kernels: 2.6.26, 2.6.27, 2.6.28-rc1 and different host kernels: 2.6.26-1-686 from to be Debian Lenny, 2.6.27.3 and 2.6.28-rc1. -- 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