Re: iomap infrastructure and multipage writes V5

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On Tue, Jun 28, 2016 at 10:26:49AM +1000, Dave Chinner wrote:
> Christoph, it look slike there's an ENOSPC+ENOMEM behavioural regression here.
> 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.
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