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

Mark Jackson
2008-12-03T12:26:43Z

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.

Okay ... thanks for the info.

Mark