Re: Badness at mm/backing-dev.c:179

Kay Sievers
2008-12-03T12:22:59Z

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.

Thanks,
Kay