XFS WARN_ON in xfs_vm_writepage

[Dave Chinner]

On Fri, Jun 13, 2014 at 10:19:25AM -0400, Dave Jones wrote:
> On Fri, Jun 13, 2014 at 04:26:45PM +1000, Dave Chinner wrote:
> 
> > >  970         if (WARN_ON_ONCE((current->flags & (PF_MEMALLOC|PF_KSWAPD)) ==
> > >  971                         PF_MEMALLOC))
> >
> > What were you running at the time? The XFS warning is there to
> > indicate that memory reclaim is doing something it shouldn't (i.e.
> > dirty page writeback from direct reclaim), so this is one for the mm
> > folk to work out...
> 
> Trinity had driven the machine deeply into swap, and the oom killer was
> kicking in pretty often. Then this happened.

Yup, sounds like a problem somewhere in mm/vmscan.c....

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com