Re: [PATCH] xfs/614: fix test for parent pointers

[Christoph Hellwig <hch@infradead.org>]

On Tue, Jan 20, 2026 at 05:27:00PM -0800, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
> 
> Almost a decade ago, the initial rmap/reflink patches were merged with
> hugely overestimated log space reservations.  Although we adjusted the
> actual runtime reservations a few years ago, we left the minimum log
> size calculations in place to avoid compatibility problems between newer
> mkfs and older kernels.
> 
> With the introduction of parent pointers, we can finally use the more
> accurate reservations for minlog computations and mkfs can format
> smaller logs as a result.  This causes the output of this test to
> change, though it wasn't needed until parent pointers were enabled by
> default.

Yeah, this has been failing for me for a while and I've been wanting
to look into it, I'm glad I don't have to :)

Reviewed-by: Christoph Hellwig <hch@lst.de>