iomap infrastructure and multipage writes V5

Tue Jun 28 08:38:11 CDT 2016

On Tue, Jun 28, 2016 at 03:28:39PM +0200, Christoph Hellwig wrote:
> > generic/224 on my 1p/1GB RAM VM using a 1k lock size filesystem has
> > significantly different behaviour once ENOSPC is hit withi this patchset.
> 
> Works fine on my 1k test setup with 4 CPUs and 2GB RAM.  1 CPU and 1GB
> RAM runs into the OOM killer, although I haven't checked if that was
> the case with the old code as well.  I'll look into this more later
> today or tomorrow.

It was doing fine before my changes - I'm going to investigate what
caused the change in behavior.