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Date:   Wed, 5 Apr 2023 08:42:34 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     "Darrick J. Wong" <djwong@kernel.org>
Cc:     Christoph Hellwig <hch@infradead.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
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Subject: Re: [PATCH 1/3] xfs: stabilize the tolower function used for
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On Wed, Apr 05, 2023 at 08:40:22AM -0700, Darrick J. Wong wrote:
> <shrug> Welllll... if someone presents a strong case for adopting the
> utf8 casefolding feature that f2fs and ext4 added some ways back, I
> could be persuaded to import that, bugs and all, into XFS.  However,
> given all the weird problems I've uncovered with "ascii"-ci, I'm going
> to be very hardnosed about adding test cases and making sure /all/ the
> tooling works properly.

You'll love this paper:

https://www.usenix.org/conference/fast23/presentation/basu