From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Thu, 28 Sep 2006 19:24:18 +0100 (BST) Received: from wx-out-0506.google.com ([66.249.82.227]:19856 "EHLO wx-out-0506.google.com") by ftp.linux-mips.org with ESMTP id S20039092AbWI1SYQ (ORCPT ); Thu, 28 Sep 2006 19:24:16 +0100 Received: by wx-out-0506.google.com with SMTP id h30so705078wxd for ; Thu, 28 Sep 2006 11:24:15 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:user-agent:x-accept-language:mime-version:to:subject:content-type; b=b63PVEE4ICLGWsjm06zar4XISId54gP4/H4hv+K7VnKi2QWRX+IitSoNcmZAITaOk25ERSFnPMVzayjh2wRmNpJ0IC/jwa3NgX+FnkZye4Oyq6T4wmkCqMuq40ADKVvKaqOrohFXxLa6DsiUoIcRGAzNgS14K9L/h5GybhtlWH0= Received: by 10.70.31.18 with SMTP id e18mr759044wxe; Thu, 28 Sep 2006 11:24:15 -0700 (PDT) Received: from ?10.0.1.104? ( [71.243.124.123]) by mx.gmail.com with ESMTP id i17sm2642763wxd.2006.09.28.11.24.13; Thu, 28 Sep 2006 11:24:14 -0700 (PDT) Message-ID: <451C134C.6010806@gmail.com> Date: Thu, 28 Sep 2006 14:24:12 -0400 From: Peter Watkins User-Agent: Mozilla Thunderbird 1.0.6 (X11/20050831) X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-mips@linux-mips.org Subject: SGI Origin 200 (ip27) with DEBUG_SPINLOCK Content-Type: multipart/mixed; boundary="------------040906080002030504050605" Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 12721 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: treestem@gmail.com Precedence: bulk X-list: linux-mips This is a multi-part message in MIME format. --------------040906080002030504050605 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Greetings SGI Origin wizards, I'm doing some SMP testing on an SGI Origin 200 (ip27). I started with a 2.6.15 vintage kernel and added changes from here: ftp://ftp.linux-mips.org/pub/linux/mips/people/ralf/ip27/ It boots both processors and runs OK. Then I turn on CONFIG_DEBUG_SPINLOCK and CONFIG_DEBUG_SPINLOCK_SLEEP, and get lots of lockup messages. A typical one is below. Anyone seen this? Some of the low-level lock code has R10000_LLSC_WAR versions, but I don't see anything wrong there. --------------040906080002030504050605 Content-Type: text/plain; name="SGI-LOCKDEBUG.txt" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="SGI-LOCKDEBUG.txt" Sep 26 16:08:15 localhost BUG: spinlock lockup on CPU#0, sshd/1876, a8000000003c7868 Sep 26 16:08:15 localhost loops-per-jiffy 110592 hz 1000 Sep 26 16:08:15 localhost owner ffffffffffffffff cpu -1 locked 0 Sep 26 16:08:15 localhost Call Trace: Sep 26 16:08:15 localhost [] _raw_spin_lock+0x220/0x2c8 Sep 26 16:08:15 localhost [] _spin_lock_irqsave+0x24/0x38 Sep 26 16:08:15 localhost [] tty_ldisc_try+0x38/0x80 Sep 26 16:08:15 localhost [] tty_ldisc_ref_wait+0x1c/0x100 Sep 26 16:08:15 localhost [] _spin_lock_irqsave+0x24/0x38 Sep 26 16:08:15 localhost [] tty_poll+0x88/0xd8 Sep 26 16:08:15 localhost [] do_select+0x298/0x4c0 Sep 26 16:08:15 localhost [] __pollwait+0x0/0x118 Sep 26 16:08:15 localhost [] vfs_ioctl+0x80/0x400 Sep 26 16:08:15 localhost [] compat_sys_select+0x318/0x710 Sep 26 16:08:15 localhost [] handle_sysn32+0x54/0xa4 Sep 26 16:08:15 localhost --------------040906080002030504050605--