Re: support large folios for NFS

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On Tue, May 28, 2024 at 10:05:58PM +0100, Matthew Wilcox wrote:
> On Mon, May 27, 2024 at 06:36:07PM +0200, Christoph Hellwig wrote:
> > Hi all,
> > 
> > this series adds large folio support to NFS, and almost doubles the
> > buffered write throughput from the previous bottleneck of ~2.5GB/s
> > (just like for other file systems).
> > 
> > The first patch is an old one from willy that I've updated very slightly.
> > Note that this update now requires the mapping_max_folio_size helper
> > merged into Linus' tree only a few minutes ago.
> 
> Kind of surprised this didn't fall over given the bugs I just sent a
> patch for ... misinterpreting the folio indices seems like it should
> have caused a failure in _some_ fstest.

I've run quite few tests with different NFS protocol versions, and there
were no new failures, and the existing one is a MM one also reproducible
with local XFS.  That's indeed a bit odd.




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