reproducible xfs/vmap oops

Wed Feb 4 02:30:37 CST 2009

On Wed, Feb 04, 2009 at 03:15:47AM -0500, Christoph Hellwig wrote:
> On Wed, Feb 04, 2009 at 04:48:55PM +1100, Nick Piggin wrote:
> > OK, I could reproduce this directly with a vmap test. With this patch,
> > I'm no longer able to. (not sure how this mail client goes with attaching
> > patches, sorry if it messes up)
> 
> With that patch applies I run into a different issue:

And later on we run out of vmalloc space a lot getting warnings like
this:

[ 5796.986579] vmap allocation for size 4194304 failed: use
vmalloc=<size> to increase size.
[ 5797.008728] xfs_buf_get_noaddr: failed to map pages

This didn't happen before.  Maybe it's a result of some of the more
lazy TLB flushing?