Messages in this thread |  | | | Date | Mon, 8 Dec 2008 09:16:37 +0100 (CET) | | From | Geert Uytterhoeven <> | | Subject | Re: Badness at mm/backing-dev.c:179 |
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On Wed, 3 Dec 2008, Kay Sievers wrote: > On Wed, Dec 3, 2008 at 13:07, Mark Jackson <mpfj@mimc.co.uk> 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@vrfy.org> > > 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@linux-m68k.org
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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