Re: [3.2-rc7] slowdown, warning + oops creating lots of files

[Dave Chinner <david@fromorbit.com>]

On Thu, Jan 05, 2012 at 02:45:00PM -0500, Chris Mason wrote:
> On Thu, Jan 05, 2012 at 01:46:57PM -0500, Chris Mason wrote:
> > On Thu, Jan 05, 2012 at 10:01:22AM +1100, Dave Chinner wrote:
> > > On Thu, Jan 05, 2012 at 09:23:52AM +1100, Chris Samuel wrote:
> > > > On 05/01/12 09:11, Dave Chinner wrote:
> > > > 
> > > > > Looks to be reproducable.
> > > > 
> > > > Does this happen with rc6 ?
> > > 
> > > I haven't tried. All I'm doing is running some benchmarks to get
> > > numbers for a talk I'm giving about improvements in XFS metadata
> > > scalability, so I wanted to update my last set of numbers from
> > > 2.6.39.
> > > 
> > > As it was, these benchmarks also failed on btrfs with oopsen and
> > > corruptions back in 2.6.39 time frame.  e.g. same VM, same
> > > test, different crashes, similar slowdowns as reported here:
> > > http://comments.gmane.org/gmane.comp.file-systems.btrfs/11062
> > > 
> > > Given that there is now a history of this simple test uncovering
> > > problems, perhaps this is a test that should be run more regularly
> > > by btrfs developers?
> > 
> > Unfortunately, this one works for me.  I'll try it again and see if I
> > can push harder.  If not, I'll see if I can trade beer for some
> > diagnostic runs.
> 
> Aha, if I try it just on the ssd instead of on my full array it triggers
> at 88M files.  Great.

Good to know.  The error that is generating the BUG on my machine is
-28 (ENOSPC).  Given there's 17TB free on my filesystem....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com