Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753874Ab0DAVHZ (ORCPT ); Thu, 1 Apr 2010 17:07:25 -0400 Received: from www.tglx.de ([62.245.132.106]:47791 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751562Ab0DAVHW (ORCPT ); Thu, 1 Apr 2010 17:07:22 -0400 Date: Thu, 1 Apr 2010 23:07:17 +0200 (CEST) From: Thomas Gleixner To: Xianghua Xiao cc: linux-kernel@vger.kernel.org Subject: Re: [ANNOUNCE] 2.6.33.1-rt11 - BUG? In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1528 Lines: 39 On Thu, 1 Apr 2010, Xianghua Xiao wrote: Can you please stop top posting ? > Here is the new dmesg output: > BUG: sleeping function called from invalid context at kernel/rtmutex.c:684 > pcnt: 1 0 in_atomic(): 1, irqs_disabled(): 1, pid: 5770, name: insmod > Call Trace: > [ce935dc0] [c00096cc] show_stack+0x6c/0x1a4 (unreliable) > [ce935df0] [c001f928] __might_sleep+0x104/0x108 > [ce935e00] [c03cb414] rt_spin_lock+0xa0/0xa4 > [ce935e10] [c00a4098] kmem_cache_alloc+0x50/0x17c > [ce935e40] [c0073570] irq_to_desc_alloc_node+0x104/0x5ec > [ce935e60] [c00064e0] irq_setup_virq+0x30/0xa8 > [ce935e80] [c000665c] irq_create_mapping+0x104/0x168 > [ce935ea0] [d1f69bc4] dma_init+0x118/0x1f0 [ipc] > [ce935ee0] [d1f75018] ipc_init+0x18/0x140 [ipc] > [ce935ef0] [c00038e0] do_one_initcall+0x54/0x210 > [ce935f20] [c005e424] sys_init_module+0x120/0x240 > [ce935f40] [c00139d4] ret_from_syscall+0x0/0x38 > > I chased from ipc_init to irq_to_desc_alloc_node and found no > interrupt-disabling. > > By looking at irq_to_desc_alloc_node (kernel/irq/handler.c) it has > raw_spin_lock_irqsave(), with this raw spinlock irqsave I'm not sure > if it causes trouble at kmem_cache_alloc after rt11 is applied, still > checking on that. Can you please disabled CONFIG_SPARSE_IRQ ? Thanks, tglx -- 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/