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From: Dirk Gouders <gouders@et.bocholt.fh-gelsenkirchen.de>
To: Tejun Heo <tj@kernel.org>, Kay Sievers <kay.sievers@vrfy.org>
Cc: linux-kernel@vger.kernel.org
Subject: [BUG] Problem since "block: make gendisk hold a reference to its queue"
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Date: Tue, 10 Jan 2012 15:11:10 +0100
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--=-=-=

Hello Tejun and Kay,

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.

The reason why I explicitely added Kay as a recipient is that I noticed
these log messages when I bisected a problem with suspend to RAM on my
laptop.  Suspend works fine but not wakeup and I bisected this to commit
8a25a2fd12.  I do not know if the kernel messages and the problem with
wakeup are related but at least wanted to let Kay know this possible
relationship of problems.

Best regards,

Dirk


--=-=-=
Content-Disposition: inline; filename=msg.txt
Content-Description: Kernel Log

floppy0: no floppy controllers found
=============================================================================
BUG blkdev_queue: Poison overwritten
-----------------------------------------------------------------------------

INFO: 0xffff88006ec30428-0xffff88006ec30428. First byte 0x6a instead of 0x6b
INFO: Allocated in blk_alloc_queue_node+0x1e/0x1a2 age=756 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 0xffffea0001bb0c00 objects=15 used=15 fp=0x          (null) flags=0x100000000004080
INFO: Object 0xffff88006ec30000 @offset=0 fp=0xffff88006ec37310

Object ffff88006ec30000: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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Object ffff88006ec30090: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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Object ffff88006ec304f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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Object ffff88006ec30530: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30540: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30550: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30560: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30570: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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Object ffff88006ec305f0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30600: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
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Object ffff88006ec30630: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30640: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30650: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30660: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30670: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30680: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec30690: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec306a0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec306b0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec306c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec306d0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
Object ffff88006ec306e0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5  kkkkkkkkkkkkkkk.
Redzone ffff88006ec306f0: bb bb bb bb bb bb bb bb                          ........
Padding ffff88006ec30830: 5a 5a 5a 5a 5a 5a 5a 5a                          ZZZZZZZZ
Pid: 1, comm: swapper/0 Not tainted 3.2.0-04874-ge4e1118 #84
Call Trace:
 [<ffffffff810e41fb>] ? check_bytes_and_report+0xad/0xe6
 [<ffffffff810e42ef>] ? check_object+0xbb/0x1f7
 [<ffffffff812041b5>] ? blk_alloc_queue_node+0x1e/0x1a2
 [<ffffffff810e5bd8>] ? alloc_debug_processing+0xa3/0x15e
 [<ffffffff810e6f74>] ? __slab_alloc.clone.34+0x3c2/0x402
 [<ffffffff812041b5>] ? blk_alloc_queue_node+0x1e/0x1a2
 [<ffffffff812cd106>] ? brd_alloc+0x2e/0x170
 [<ffffffff810c7d90>] ? pcpu_free_area+0xae/0x124
 [<ffffffff810e736e>] ? kmem_cache_alloc_node+0x5a/0x153
 [<ffffffff812041b5>] ? blk_alloc_queue_node+0x1e/0x1a2
 [<ffffffff812cd142>] ? brd_alloc+0x6a/0x170
 [<ffffffff817bec1f>] ? brd_init+0xbe/0x1b7
 [<ffffffff817beb61>] ? ramdisk_size+0x1d/0x1d
 [<ffffffff810002e5>] ? do_one_initcall+0x78/0x12b
 [<ffffffff81798b2c>] ? kernel_init+0x95/0x113
 [<ffffffff814a9154>] ? kernel_thread_helper+0x4/0x10
 [<ffffffff81798a97>] ? start_kernel+0x32c/0x32c
 [<ffffffff814a9150>] ? gs_change+0xb/0xb
FIX blkdev_queue: Restoring 0xffff88006ec30428-0xffff88006ec30428=0x6b

FIX blkdev_queue: Marking all objects used
brd: module loaded
loop: module loaded

--=-=-=--