On Wed, 3 Dec 2008, Kay Sievers wrote:
On Wed, Dec 3, 2008 at 13:07, Mark Jackson <mpfj@xxxxxxxxxx> wrote:
The following commit causes a "Badness at mm/backing-dev.c:179":-
f1d0b063d993527754f062c589b73f125024d216 is first bad commit
commit f1d0b063d993527754f062c589b73f125024d216
Author: Kay Sievers <kay.sievers@xxxxxxxx>
Date: Tue Dec 2 10:31:50 2008 -0800
bdi: register sysfs bdi device only once per queue
Below is the extract from dmesg:-
------------[ cut here ]------------
Badness at mm/backing-dev.c:179
That's a known issue, and will not cause any harm besides printing
this warning. Andrew added the warning to catch drivers who use one
single request queue for multiple devices. Currently known are mtd and
floppy (triggers only if you have more than one device per driver).
The drivers need to be changed to use a separate queue per device, to
get rid of this warning.
I guess this one (introduced after 2.6.28-rc7) is an incarnation of the same
issue?
WARNING: at mm/backing-dev.c:179 0x2069cb()
Modules linked in:
Call Trace: [<000273ee>] warn_on_slowpath+0x44/0x60
[<001be5b0>] mutex_lock+0x0/0x24
[<00075d1e>] ifind+0x16/0x5c
[<000a0844>] sysfs_ilookup_test+0x0/0x18
[<00075d92>] ilookup5+0x2e/0x38
[<000a0e70>] sysfs_addrm_finish+0x1c/0x200
[<000a047e>] sysfs_create_file+0x0/0x44
[<000a0432>] sysfs_add_file_mode+0x5a/0x84
[<000efc5a>] kobject_uevent_env+0x46/0x30c
[<000a047e>] sysfs_create_file+0x0/0x44
[<000a0478>] sysfs_add_file+0x1c/0x22
[<000eff30>] kobject_uevent+0x10/0x16
[<000e1332>] elv_register_queue+0x64/0x6e
[<000eff20>] kobject_uevent+0x0/0x16
[<000e450e>] blk_register_queue+0x56/0x94
[<00051684>] bdi_register+0x54/0x5e
[<000f4040>] sprintf+0x0/0x26
[<000516b4>] bdi_register_dev+0x26/0x2c
[<000e7e70>] add_disk+0xb8/0x12c
[<000e7db8>] add_disk+0x0/0x12c
[<0027e424>] atari_floppy_init+0x14c/0x6e4
[<0027e2d8>] atari_floppy_init+0x0/0x6e4
[<00002008>] do_one_initcall+0x0/0x19a
[<002781ce>] __alloc_bootmem+0x0/0x1a
[<00002024>] do_one_initcall+0x1c/0x19a
[<001be5b0>] mutex_lock+0x0/0x24
[<00075d1e>] ifind+0x16/0x5c
[<000a0844>] sysfs_ilookup_test+0x0/0x18
[<00075d92>] ilookup5+0x2e/0x38
[<000a0e70>] sysfs_addrm_finish+0x1c/0x200
[<002781ce>] __alloc_bootmem+0x0/0x1a
[<000a0432>] sysfs_add_file_mode+0x5a/0x84
[<001244aa>] sysdev_class_create_file+0x0/0x16
[<000a0478>] sysfs_add_file+0x1c/0x22
[<000a04bc>] sysfs_create_file+0x3e/0x44
[<001244bc>] sysdev_class_create_file+0x12/0x16
[<0027e102>] cpu_dev_init+0x4e/0x6c
[<0026eaa8>] kernel_init+0x6e/0xc2
[<0027e2d8>] atari_floppy_init+0x0/0x6e4
[<0026ea3a>] kernel_init+0x0/0xc2
[<00027902>] printk+0x0/0x1a
[<00002ada>] kernel_thread+0x3a/0x4e
---[ end trace 7d0e1e0e92952ce0 ]---
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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