Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932203AbVKOAQs (ORCPT ); Mon, 14 Nov 2005 19:16:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932259AbVKOAQr (ORCPT ); Mon, 14 Nov 2005 19:16:47 -0500 Received: from smtp.osdl.org ([65.172.181.4]:13020 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S932203AbVKOAQr (ORCPT ); Mon, 14 Nov 2005 19:16:47 -0500 Date: Mon, 14 Nov 2005 16:17:04 -0800 From: Andrew Morton To: Badari Pulavarty Cc: linux-kernel@vger.kernel.org, hugh@veritas.com Subject: Re: 2.6.14 X spinning in the kernel Message-Id: <20051114161704.5b918e67.akpm@osdl.org> In-Reply-To: <1132012281.24066.36.camel@localhost.localdomain> References: <1132012281.24066.36.camel@localhost.localdomain> X-Mailer: Sylpheed version 1.0.0 (GTK+ 1.2.10; i386-vine-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 994 Lines: 29 Badari Pulavarty wrote: > > My 2-cpu EM64T machine started showing this problem again on 2.6.14. > On some reboots, X seems to spin in the kernel forever. > > sysrq-t output shows nothing. > > X R running task 0 3607 3589 3903 > (L-TLB) > > top shows: > 3607 root 25 0 0 0 0 R 99.1 0.0 262:04.69 X > > > So, I wrote a module to do smp_call_function() on all CPUs > to show stacks on them. CPU0 seems to be spinning in exit_mmap(). > I did this multiple times to collect stacks few times. > > Is this a known issue ? Nope. Maybe your vma list has a loop in it, in remove_vma()? slab debugging would detect that, due to the repeated kmem_cache_free(vm_area_cachep, vma); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/