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Date: Wed, 03 Dec 2008 12:07:45 +0000
From: Mark Jackson <mpfj@...c.co.uk>
To: linux-kernel@...r.kernel.org, kay.sievers@...y.org
CC: Haavard Skinnemoen <haavard.skinnemoen@...el.com>
Subject: Badness at mm/backing-dev.c:179
The following commit causes a "Badness at mm/backing-dev.c:179":-
f1d0b063d993527754f062c589b73f125024d216 is first bad commit
commit f1d0b063d993527754f062c589b73f125024d216
Author: Kay Sievers <kay.sievers@...y.org>
Date: Tue Dec 2 10:31:50 2008 -0800
bdi: register sysfs bdi device only once per queue
<snip>
Tested-by: Peter Korsgaard <jacmet@...site.dk>
Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Signed-off-by: Kay Sievers <kay.sievers@...y.org>
Cc: David Woodhouse <dwmw2@...radead.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Below is the extract from dmesg:-
physmap platform flash device: 00800000 at 00000000
physmap-flash.0: Found 1 x16 devices at 0x0 in 16-bit bank
Amd/Fujitsu Extended Query Table at 0x0040
number of CFI chips: 1
cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
RedBoot partition parsing not available
Using physmap partition information
Creating 4 MTD partitions on "physmap-flash.0":
0x00000000-0x00020000 : "u-boot"
0x00020000-0x007e0000 : "root"
------------[ cut here ]------------
Badness at mm/backing-dev.c:179
PC is at bdi_register+0xe/0x44
LR is at bdi_register_dev+0x16/0x20
pc : [<9003f07a>] lr : [<9003f0c6>] Not tainted
sp : 91c19ccc r12: 91c5409c r11: 00000000
r10: 901c56c8 r9 : 0000001f r8 : 00000001
r7 : 91c19cd0 r6 : 91c5409c r5 : 91d0bc00 r4 : 00000000
r3 : 91e9b200 r2 : 901fd3fc r1 : 00000001 r0 : 00000004
Flags: qvNzc
Mode bits: hjmde....g
CPU Mode: Supervisor
Process: swapper [1] (task: 91c16000 thread: 91c18000)
Call trace:
[<9003f0c6>] bdi_register_dev+0x16/0x20
[<900d7cc4>] add_disk+0x88/0xb0
[<90100148>] add_mtd_blktrans_dev+0x178/0x188
[<901004ea>] mtdblock_add_mtd+0x36/0x3c
[<900ffec4>] blktrans_notify_add+0x1a/0x3a
[<900fe16c>] add_mtd_device+0x60/0xa0
[<900fef2e>] add_mtd_partitions+0x37e/0x3a4
[<90105614>] physmap_flash_probe+0x1ec/0x21c
[<900f9eb4>] platform_drv_probe+0x10/0x12
[<900f9680>] driver_probe_device+0x84/0xf0
[<900f9726>] __driver_attach+0x3a/0x50
[<900f904a>] bus_for_each_dev+0x2e/0x4c
[<900f9566>] driver_attach+0x12/0x14
[<900f9324>] bus_add_driver+0x6c/0x170
[<900f9860>] driver_register+0x58/0xb0
[<900fa0b6>] platform_driver_register+0x56/0x5c
[<9000adca>] physmap_init+0xa/0x10
[<900146da>] do_one_initcall+0x36/0x10c
[<90000380>] kernel_init+0x48/0x94
[<9001fca0>] do_exit+0x0/0x49c
0x007e0000-0x007f0000 : "splash"
------------[ cut here ]------------
Badness at mm/backing-dev.c:179
PC is at bdi_register+0xe/0x44
LR is at bdi_register_dev+0x16/0x20
pc : [<9003f07a>] lr : [<9003f0c6>] Tainted: G W
sp : 91c19ccc r12: 91c5409c r11: 00000000
r10: 901c56c8 r9 : 0000001f r8 : 00000002
r7 : 91c19cd0 r6 : 91c5409c r5 : 91d0bc00 r4 : 00000000
r3 : 91e9b800 r2 : 901fd414 r1 : 00000002 r0 : 00000004
Flags: qvNzc
Mode bits: hjmde....g
CPU Mode: Supervisor
Process: swapper [1] (task: 91c16000 thread: 91c18000)
Call trace:
[<9003f0c6>] bdi_register_dev+0x16/0x20
[<900d7cc4>] add_disk+0x88/0xb0
[<90100148>] add_mtd_blktrans_dev+0x178/0x188
[<901004ea>] mtdblock_add_mtd+0x36/0x3c
[<900ffec4>] blktrans_notify_add+0x1a/0x3a
[<900fe16c>] add_mtd_device+0x60/0xa0
[<900fef2e>] add_mtd_partitions+0x37e/0x3a4
[<90105614>] physmap_flash_probe+0x1ec/0x21c
[<900f9eb4>] platform_drv_probe+0x10/0x12
[<900f9680>] driver_probe_device+0x84/0xf0
[<900f9726>] __driver_attach+0x3a/0x50
[<900f904a>] bus_for_each_dev+0x2e/0x4c
[<900f9566>] driver_attach+0x12/0x14
[<900f9324>] bus_add_driver+0x6c/0x170
[<900f9860>] driver_register+0x58/0xb0
[<900fa0b6>] platform_driver_register+0x56/0x5c
[<9000adca>] physmap_init+0xa/0x10
[<900146da>] do_one_initcall+0x36/0x10c
[<90000380>] kernel_init+0x48/0x94
[<9001fca0>] do_exit+0x0/0x49c
0x007f0000-0x00800000 : "env"
------------[ cut here ]------------
Badness at mm/backing-dev.c:179
PC is at bdi_register+0xe/0x44
LR is at bdi_register_dev+0x16/0x20
pc : [<9003f07a>] lr : [<9003f0c6>] Tainted: G W
sp : 91c19ccc r12: 91c5409c r11: 00000000
r10: 901c56c8 r9 : 0000001f r8 : 00000003
r7 : 91c19cd0 r6 : 91c5409c r5 : 91d0bc00 r4 : 00000000
r3 : 91e9be00 r2 : 901fd42c r1 : 00000003 r0 : 00000004
Flags: qvNzc
Mode bits: hjmde....g
CPU Mode: Supervisor
Process: swapper [1] (task: 91c16000 thread: 91c18000)
Call trace:
[<9003f0c6>] bdi_register_dev+0x16/0x20
[<900d7cc4>] add_disk+0x88/0xb0
[<90100148>] add_mtd_blktrans_dev+0x178/0x188
[<901004ea>] mtdblock_add_mtd+0x36/0x3c
[<900ffec4>] blktrans_notify_add+0x1a/0x3a
[<900fe16c>] add_mtd_device+0x60/0xa0
[<900fef2e>] add_mtd_partitions+0x37e/0x3a4
[<90105614>] physmap_flash_probe+0x1ec/0x21c
[<900f9eb4>] platform_drv_probe+0x10/0x12
[<900f9680>] driver_probe_device+0x84/0xf0
[<900f9726>] __driver_attach+0x3a/0x50
[<900f904a>] bus_for_each_dev+0x2e/0x4c
[<900f9566>] driver_attach+0x12/0x14
[<900f9324>] bus_add_driver+0x6c/0x170
[<900f9860>] driver_register+0x58/0xb0
[<900fa0b6>] platform_driver_register+0x56/0x5c
[<9000adca>] physmap_init+0xa/0x10
[<900146da>] do_one_initcall+0x36/0x10c
[<90000380>] kernel_init+0x48/0x94
[<9001fca0>] do_exit+0x0/0x49c
physmap platform flash device: 00800000 at 08000000
physmap-flash.1: Found 1 x16 devices at 0x0 in 16-bit bank
Amd/Fujitsu Extended Query Table at 0x0040
number of CFI chips: 1
cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.
RedBoot partition parsing not available
Using physmap partition information
Creating 1 MTD partitions on "physmap-flash.1":
0x00000000-0x00800000 : "data"
------------[ cut here ]------------
Badness at mm/backing-dev.c:179
PC is at bdi_register+0xe/0x44
LR is at bdi_register_dev+0x16/0x20
pc : [<9003f07a>] lr : [<9003f0c6>] Tainted: G W
sp : 91c19ccc r12: 91c5409c r11: 00000000
r10: 901c56c8 r9 : 0000001f r8 : 00000004
r7 : 91c19cd0 r6 : 91c5409c r5 : 91d0bc00 r4 : 00000000
r3 : 91cb9400 r2 : 901fd444 r1 : 00000000 r0 : 00000001
Flags: qvNzc
Mode bits: hjmde....g
CPU Mode: Supervisor
Process: swapper [1] (task: 91c16000 thread: 91c18000)
Call trace:
[<9003f0c6>] bdi_register_dev+0x16/0x20
[<900d7cc4>] add_disk+0x88/0xb0
[<90100148>] add_mtd_blktrans_dev+0x178/0x188
[<901004ea>] mtdblock_add_mtd+0x36/0x3c
[<900ffec4>] blktrans_notify_add+0x1a/0x3a
[<900fe16c>] add_mtd_device+0x60/0xa0
[<900fef2e>] add_mtd_partitions+0x37e/0x3a4
[<90105614>] physmap_flash_probe+0x1ec/0x21c
[<900f9eb4>] platform_drv_probe+0x10/0x12
[<900f9680>] driver_probe_device+0x84/0xf0
[<900f9726>] __driver_attach+0x3a/0x50
[<900f904a>] bus_for_each_dev+0x2e/0x4c
[<900f9566>] driver_attach+0x12/0x14
[<900f9324>] bus_add_driver+0x6c/0x170
[<900f9860>] driver_register+0x58/0xb0
[<900fa0b6>] platform_driver_register+0x56/0x5c
[<9000adca>] physmap_init+0xa/0x10
[<900146da>] do_one_initcall+0x36/0x10c
[<90000380>] kernel_init+0x48/0x94
[<9001fca0>] do_exit+0x0/0x49c
Regards
Mark
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