Re: Linux 3.1 domU + ext3 = WARNING: at fs/ext3/inode.c

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Wed, Oct 26, 2011 at 04:26:40PM -0400, Christopher S. Aker wrote:
> On 10/25/11 5:15 PM, Konrad Rzeszutek Wilk wrote:
> >You see the same exact thing with 3.0.6?
> 
> It works with 3.0.4 - do you need me to try 3.0.6 specifically?

No need.
> 
> >but you said that if you use 3.0 domU with 2.6.18 you do not get the
> >type of warnings as above?
> 
> Correct.
> 
> >Also, when the DomU guest starts it should report if it "thinks" it
> >supports barriers. Something like: blkbfront: xvda: barrier
> >
> >Or is this the only message you get from blkfront??
> 
> 2.6.18 dom0 + 3.0.4 domU produces this and nothing else:
> 
> blkfront: xvda: barrier: enabled
> blkfront: xvdb: barrier: enabled
> 
> 2.6.18 dom0 = works with 3.0.4, breaks with 3.1.

OK, so there is nothing that changed in 3.0 through 3.1 in xen-blkfront.c.
Well, there was a name change, but nothing else.

I am going to bet that if you compile 3.0.4 or 3.0.6 with that
fancy new config option that turns EXT3_ORDERED_something you will
see the same exact problem.