Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933310AbaFSPDK (ORCPT ); Thu, 19 Jun 2014 11:03:10 -0400 Received: from qmta08.emeryville.ca.mail.comcast.net ([76.96.30.80]:49613 "EHLO qmta08.emeryville.ca.mail.comcast.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933188AbaFSPDI (ORCPT ); Thu, 19 Jun 2014 11:03:08 -0400 Date: Thu, 19 Jun 2014 10:03:04 -0500 (CDT) From: Christoph Lameter To: Sasha Levin cc: Pekka Enberg , Thomas Gleixner , Matt Mackall , Andrew Morton , Dave Jones , "linux-mm@kvack.org" , "Paul E. McKenney" , Dave Jones , LKML Subject: Re: slub/debugobjects: lockup when freeing memory In-Reply-To: <53A2F406.4010109@oracle.com> Message-ID: References: <53A2F406.4010109@oracle.com> Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 19 Jun 2014, Sasha Levin wrote: > [ 690.770137] ? __this_cpu_preempt_check (lib/smp_processor_id.c:63) > [ 690.770137] __slab_alloc (mm/slub.c:1732 mm/slub.c:2205 mm/slub.c:2369) > [ 690.770137] ? __lock_acquire (kernel/locking/lockdep.c:3189) > [ 690.770137] ? __debug_object_init (lib/debugobjects.c:100 lib/debugobjects.c:312) > [ 690.770137] kmem_cache_alloc (mm/slub.c:2442 mm/slub.c:2484 mm/slub.c:2489) > [ 690.770137] ? __debug_object_init (lib/debugobjects.c:100 lib/debugobjects.c:312) > [ 690.770137] ? debug_object_activate (lib/debugobjects.c:439) > [ 690.770137] __debug_object_init (lib/debugobjects.c:100 lib/debugobjects.c:312) > [ 690.770137] debug_object_init (lib/debugobjects.c:365) > [ 690.770137] rcuhead_fixup_activate (kernel/rcu/update.c:231) > [ 690.770137] debug_object_activate (lib/debugobjects.c:280 lib/debugobjects.c:439) > [ 690.770137] ? discard_slab (mm/slub.c:1486) > [ 690.770137] __call_rcu (kernel/rcu/rcu.h:76 (discriminator 2) kernel/rcu/tree.c:2585 (discriminator 2)) __call_rcu does a slab allocation? This means __call_rcu can no longer be used in slab allocators? What happened? -- 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/