From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michal Piotrowski" Subject: Re: 2.6.17-mm3 Date: Tue, 27 Jun 2006 16:12:42 +0200 Message-ID: <6bffcb0e0606270712w166f04a6u237d695e2bfa1913@mail.gmail.com> References: <20060627015211.ce480da6.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: "Stephen Hemminger" , "Ingo Molnar" , "Arjan van de Ven" , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: Received: from py-out-1112.google.com ([64.233.166.181]:50234 "EHLO py-out-1112.google.com") by vger.kernel.org with ESMTP id S932345AbWF0OMn (ORCPT ); Tue, 27 Jun 2006 10:12:43 -0400 Received: by py-out-1112.google.com with SMTP id f25so1853330pyf for ; Tue, 27 Jun 2006 07:12:43 -0700 (PDT) To: "Andrew Morton" In-Reply-To: <20060627015211.ce480da6.akpm@osdl.org> Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Hi, On 27/06/06, Andrew Morton wrote: > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.17/2.6.17-mm3/ > > It looks like a skge bug ========================================================= [ INFO: possible irq lock inversion dependency detected ] --------------------------------------------------------- swapper/0 just changed the state of lock: (tasklist_lock){..-?}, at: [] send_group_sig_info+0x16/0x34 but this lock took another, soft-irq-unsafe lock in the past: (&sig->stats_lock){--..} and interrupts could create inverse lock ordering between them. other info that might help us debug this: no locks held by swapper/0. the first lock's dependencies: -> (tasklist_lock){..-?} ops: 13763 { initial-use at: [] lock_acquire+0x60/0x80 [] _write_lock_irq+0x29/0x38 [] copy_process+0xea7/0x13c0 [] do_fork+0x8d/0x18f [] kernel_thread+0x6c/0x74 [] rest_init+0x14/0x3c [] start_kernel+0x388/0x390 [] 0xc0100210 in-softirq-R at: [..] Here is a dmesg log http://www.stardust.webpages.pl/files/mm/2.6.17-mm3/mm-dmesg Here is a config file http://www.stardust.webpages.pl/files/mm/2.6.17-mm3/mm-config Regards, Michal -- Michal K. K. Piotrowski LTG - Linux Testers Group (http://www.stardust.webpages.pl/ltg/wiki/)