Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753327Ab2K1Ilg (ORCPT ); Wed, 28 Nov 2012 03:41:36 -0500 Received: from e28smtp08.in.ibm.com ([122.248.162.8]:33184 "EHLO e28smtp08.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753079Ab2K1Ile (ORCPT ); Wed, 28 Nov 2012 03:41:34 -0500 Message-ID: <1354092082.3054.19.camel@ThinkPad-T5421.cn.ibm.com> Subject: Re: 3.7-rc7: BUG: MAX_STACK_TRACE_ENTRIES too low! From: Li Zhong To: Christian Kujau Cc: LKML , linuxppc-dev@lists.ozlabs.org, paulus@samba.org Date: Wed, 28 Nov 2012 16:41:22 +0800 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.3-0ubuntu6 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 x-cbid: 12112808-2000-0000-0000-00000A0BF997 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2468 Lines: 68 On Tue, 2012-11-27 at 19:22 -0800, Christian Kujau wrote: > On Tue, 27 Nov 2012 at 19:06, Christian Kujau wrote: > > the same thing[0] happened again in 3.7-rc7, after ~20h uptime: > > I found the following on patchwork, but this seems to deal with powerpc64 > only, while this PowerBook G4 of mine is powerpc32: > > http://patchwork.ozlabs.org/patch/193414/ > > It looks related, but then again, I fail to parse assember... Hi Christian, Would you please help to try the following fix? I don't have a powerpc32 machine for test... Thanks, Zhong ============================================== diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 9499385..cadebfd 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -439,6 +439,8 @@ ret_from_fork: ret_from_kernel_thread: REST_NVGPRS(r1) bl schedule_tail + li r3,0 + stw r3,0(r1) mtlr r14 mr r3,r15 PPC440EP_ERR42 ============================================== > > Christian. > > > [40007.339487] [sched_delayed] sched: RT throttling activated > > [69731.388717] BUG: MAX_STACK_TRACE_ENTRIES too low! > > [69731.390371] turning off the locking correctness validator. > > [69731.391942] Call Trace: > > [69731.393525] [c9a61c10] [c0009064] show_stack+0x70/0x1bc (unreliable) > > [69731.395152] [c9a61c50] [c0077460] save_trace+0xfc/0x114 > > [69731.396735] [c9a61c60] [c007be20] __lock_acquire+0x1568/0x19b8 > > [69731.398296] [c9a61d00] [c007c2c0] lock_acquire+0x50/0x70 > > [69731.399857] [c9a61d20] [c0550e28] _raw_spin_lock_irq+0x5c/0x78 > > [69731.401419] [c9a61d40] [c054fb58] __schedule+0xd8/0x534 > > [69731.402972] [c9a61da0] [c0550094] _cond_resched+0x50/0x68 > > [69731.404527] [c9a61db0] [c0479908] dst_gc_task+0xbc/0x258 > > [69731.406070] [c9a61e40] [c004eeb8] process_one_work+0x1f4/0x49c > > [69731.407585] [c9a61e80] [c004f644] worker_thread+0x14c/0x400 > > [69731.409075] [c9a61eb0] [c0057634] kthread+0xbc/0xc0 > > [69731.410521] [c9a61f40] [c0011ad4] ret_from_kernel_thread+0x5c/0x64 > > [...repeated 54 times...] > > > > Anyone knows what this is about? > > > > Thanks, > > Christian. > > > > [0] http://lkml.indiana.edu/hypermail/linux/kernel/1211.0/03025.html -- 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/