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

To: Octavian Purdila <octavian.purdila@xxxxxxxxx>
Subject: Re: [RFC PATCH] xfs: support for non-mmu architectures
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 20 Nov 2015 10:24:55 +1100
Cc: xfs@xxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1447800381-20167-1-git-send-email-octavian.purdila@xxxxxxxxx>
References: <1447800381-20167-1-git-send-email-octavian.purdila@xxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
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....

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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