Re: [RFC PATCH] xfs: support for non-mmu architectures

Richard Weinberger
2015-11-19T23:54:02Z

On Fri, Nov 20, 2015 at 12:24 AM, Dave Chinner <david@fromorbit.com> wrote:
> On Wed, Nov 18, 2015 at 12:46:21AM +0200, Octavian Purdila wrote:
>> Naive implementation for non-mmu architectures: allocate physically
>> contiguous xfs buffers with alloc_pages. Terribly inefficient with
>> memory and fragmentation on high I/O loads but it may be good enough
>> for basic usage (which most non-mmu architectures will need).
>
> Can you please explain why you want to use XFS on low end, basic
> non-MMU devices? XFS is a high performance, enterprise/HPC level
> filesystem - it's not a filesystem designed for small IoT level
> devices - so I'm struggling to see why we'd want to expend any
> effort to make XFS work on such devices....

The use case is the Linux Kernel Library:
https://lkml.org/lkml/2015/11/3/706

Using LKL and fuse you can mount any kernel filesystem using fuse
as non-root.

--
Thanks,
//richard