Fedora 16 RC1 kernel (3.1.0-0.rc6.git0.0.fc16.x86_64) - bug on drop_caches - BZ 740637

[Dave Jones]

On Thu, Sep 22, 2011 at 03:57:48PM -0300, Lucas Meneghel Rodrigues wrote:
 > Hi guys,
 > 
 > Just to let you know that I've recently upgraded my Fedora box and hit
 > this problem
 > 
 > https://bugzilla.redhat.com/show_bug.cgi?id=740637
 > 
 > This is a recurrent problem that was present on F13, F14, was fixed on
 > F15 and now it makes a triumphant return on F16. I don't think many of
 > you will be hit, but now that I'm trying to follow Fedora-QA a little
 > better, I thought it'd be a good idea to share.

drop_caches has always been fragile, and frequently produced lockdep warnings
in the past.  If you can run the -debug build perhaps you'll get some additional
information to diagnose it. Without seeing traces, there's not really much
we can do here, as I can't seem to easily reproduce this here.

	Dave