Fwd: A lot of errors with kernel 3.13.0-43-generic

[Andy Whitcroft]

On Mon, Dec 15, 2014 at 02:47:41PM +0100, Stefan Bader wrote:

[...]
> > 
> > This looks to be introduced by:
> > 
> >     vfs: fix data corruption when blocksize < pagesize for mmaped data
> >     BugLink: http://bugs.launchpad.net/bugs/1393477
> >     commit 90a8020278c1598fafd071736a0846b38510309c upstream.
> > 
> > and fixed by:
> > 
> > commit f55fefd1a5a339b1bd08c120b93312d6eb64a9fb
> > Author: Jan Kara <jack at suse.cz>
> > Date:   Thu Oct 30 10:35:00 2014 +1100
> > 
> >     mm: Remove false WARN_ON from pagecache_isize_extended()
> 
> Oh, and just for explanation: this is a warning which is wrong. But until it is
> fixed up the only impact is the number of annoying messages in dmesg. The follow
> up change from upstream just removes the warning, nothing else. And since it is
> "only" a warning there is no other effect.

I filed a bug for this and let the triager munch on it.  It looks like
as things stand trusty/linux and precise/linux-lts-trusty are
suspecptible to this warning vomit:

    https://bugs.launchpad.net/bugs/1402764

Kamal, looks like f55fefd1a5a339b1bd08c120b93312d6eb64a9fb is something
you want if you have 90a8020278c1598fafd071736a0846b38510309c.

-apw