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

From: Mark Jackson
Date: Wed Dec 03 2008 - 07:26:44 EST

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.

Okay ... thanks for the info.


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