From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932494Ab2AJRLD (ORCPT ); Tue, 10 Jan 2012 12:11:03 -0500 Received: from alice.et.bocholt.fh-gelsenkirchen.de ([193.175.197.63]:57193 "EHLO alice.et.bocholt.fh-gelsenkirchen.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932143Ab2AJRLB (ORCPT ); Tue, 10 Jan 2012 12:11:01 -0500 X-DKIM: Sendmail DKIM Filter v2.8.3 alice.et.bocholt.fh-gelsenkirchen.de q0AHArZ8019842 From: Dirk Gouders To: Tejun Heo Cc: Kay Sievers , linux-kernel@vger.kernel.org Subject: Re: [BUG] Problem since "block: make gendisk hold a reference to its queue" In-Reply-To: <20120110162234.GA20446@google.com> (Tejun Heo's message of "Tue, 10 Jan 2012 08:22:34 -0800") References: <20120110162234.GA20446@google.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux) Date: Tue, 10 Jan 2012 18:10:51 +0100 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Greylist: Sender succeeded STARTTLS authentication, not delayed by milter-greylist-4.2.3 (alice.et.bocholt.fh-gelsenkirchen.de [192.168.0.63]); Tue, 10 Jan 2012 18:10:53 +0100 (CET) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Tejun Heo writes: > Hello, > > On Tue, Jan 10, 2012 at 03:11:10PM +0100, Dirk Gouders wrote: >> I noticed problematic kernel messages when my laptop boots, bisecting >> this issue lead me to commit 523e1d399c. I attach the messages that I >> currently (commit e4e11180df) see, please let me know if further >> information is needed. > > Thank you very much for bisecting the problem. > >> floppy0: no floppy controllers found >> ============================================================================= >> BUG blkdev_queue: Poison overwritten >> ----------------------------------------------------------------------------- > > Yeah, floppy does some funky stuff during init. > >> Object ffff88006ec30420: 6b 6b 6b 6b 6b 6b 6b 6b 6a 6b 6b 6b 6b 6b 6b 6b kkkkkkkkjkkkkkkk > > This looks like refcnt is dec'd after released. Can you please apply > the following patch and see whether the WARN_ON() triggers? I applied the patch and attached the output. I did another test and reverted 523e1d399c. After that the kernel messages didn't show up but that did not help with wakeup from suspend. I guess these problems are unrelated and Kay probably wants to deal with them separately? Dirk > diff --git a/block/blk-core.c b/block/blk-core.c > index 15de223..c3de15e 100644 > --- a/block/blk-core.c > +++ b/block/blk-core.c > @@ -342,6 +342,7 @@ EXPORT_SYMBOL(blk_run_queue); > > void blk_put_queue(struct request_queue *q) > { > + WARN_ON(atomic_read(&q->kobj.kref.refcount) == 0x6b6b6b6b); > kobject_put(&q->kobj); > } > EXPORT_SYMBOL(blk_put_queue); floppy0: no floppy controllers found ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Not tainted 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427e9 ]--- ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427ea ]--- ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427eb ]--- ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427ec ]--- ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427ed ]--- ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427ee ]--- ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427ef ]--- ------------[ cut here ]------------ WARNING: at block/blk-core.c:345 blk_put_queue+0x22/0x2f() Hardware name: 08946MG Modules linked in: Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? warn_slowpath_common+0x78/0x8c [] ? blk_put_queue+0x22/0x2f [] ? disk_release+0xa1/0xaf [] ? device_release+0x41/0x73 [] ? kobject_release+0x48/0x5e [] ? floppy_init+0xd81/0xd96 [] ? register_cpu_notifier+0x25/0x2f [] ? daring+0x67/0x67 [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb ---[ end trace f96f3959e84427f0 ]--- ============================================================================= BUG blkdev_queue: Poison overwritten ----------------------------------------------------------------------------- INFO: 0xffff88006ec18428-0xffff88006ec18428. First byte 0x6a instead of 0x6b INFO: Allocated in blk_alloc_queue_node+0x1e/0x1a2 age=760 cpu=0 pid=1 set_track+0x5e/0xd6 alloc_debug_processing+0xbd/0x15e __slab_alloc.clone.34+0x3c2/0x402 blk_alloc_queue_node+0x1e/0x1a2 rb_insert_color+0xb1/0xd9 rand_initialize_disk+0x1f/0x34 kmem_cache_alloc_node+0x5a/0x153 get_parent_ip+0x9/0x1b blk_alloc_queue_node+0x1e/0x1a2 do_fd_request+0x0/0xa8 blk_init_queue_node+0x1a/0x52 alloc_disk_node+0xba/0xdd floppy_init+0x78/0xd96 register_cpu_notifier+0x25/0x2f floppy_init+0x0/0xd96 do_one_initcall+0x78/0x12b INFO: Freed in kobject_release+0x48/0x5e age=0 cpu=0 pid=1 set_track+0x5e/0xd6 free_debug_processing+0x195/0x25b __slab_free+0x29/0x343 add_preempt_count+0x9a/0x9c _raw_spin_lock_irqsave+0x16/0x37 get_parent_ip+0x9/0x1b pcpu_free_area+0xae/0x124 get_parent_ip+0x9/0x1b pcpu_free_area+0xfb/0x124 pcpu_chunk_relocate+0xc/0x72 kobject_release+0x48/0x5e kmem_cache_free+0x9b/0x111 kobject_release+0x48/0x5e floppy_init+0xd71/0xd96 register_cpu_notifier+0x25/0x2f floppy_init+0x0/0xd96 INFO: Slab 0xffffea0001bb0600 objects=15 used=15 fp=0x (null) flags=0x100000000004080 INFO: Object 0xffff88006ec18000 @offset=0 fp=0xffff88006ec1f310 Object ffff88006ec18000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18010: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18020: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18030: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18040: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18050: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18060: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18070: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18080: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 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kkkkkkkkkkkkkkkk Object ffff88006ec184b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec184c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec184d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec184e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec184f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18500: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18510: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18520: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18530: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18540: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18550: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18560: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18570: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18580: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18590: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec185a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec185b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec185c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec185d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec185e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec185f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18600: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18610: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18620: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18630: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18640: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18650: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18660: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18670: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18680: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec18690: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec186a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec186b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec186c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec186d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff88006ec186e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk. Redzone ffff88006ec186f0: bb bb bb bb bb bb bb bb ........ Padding ffff88006ec18830: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ Pid: 1, comm: swapper/0 Tainted: G W 3.2.0-04874-ge4e1118-dirty #86 Call Trace: [] ? check_bytes_and_report+0xad/0xe6 [] ? check_object+0xbb/0x1f7 [] ? blk_alloc_queue_node+0x1e/0x1a2 [] ? alloc_debug_processing+0xa3/0x15e [] ? __slab_alloc.clone.34+0x3c2/0x402 [] ? blk_alloc_queue_node+0x1e/0x1a2 [] ? brd_alloc+0x2e/0x170 [] ? kmem_cache_alloc_node+0x5a/0x153 [] ? blk_alloc_queue_node+0x1e/0x1a2 [] ? brd_alloc+0x6a/0x170 [] ? brd_init+0xbe/0x1b7 [] ? ramdisk_size+0x1d/0x1d [] ? do_one_initcall+0x78/0x12b [] ? kernel_init+0x95/0x113 [] ? kernel_thread_helper+0x4/0x10 [] ? start_kernel+0x32c/0x32c [] ? gs_change+0xb/0xb FIX blkdev_queue: Restoring 0xffff88006ec18428-0xffff88006ec18428=0x6b FIX blkdev_queue: Marking all objects used brd: module loaded loop: module loaded