Re: [PATCH 1/6] xfs: fix xfs_rtrmapbt_mem_cursor for non-rmap filesystems

Christoph Hellwig <[email protected]>
Newsgroups org.kernel.vger.linux-xfs,org.kernel.vger.stable
Message-ID <[email protected]> 
On Wed, Aug 12, 2026 at 10:25:40PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <[email protected]>
> 
> It's possible to construct an in-memory rtrmap btree for filesystems
> that don't have the rmap feature enabled.  The kernel doesn't do this,
> but xfs_repair will, if asked to reindex a filesystem that has rtreflink
> enabled but not rtrmap.  Therefore, we must create the cursor with
> enough levels to handle a maximally sized btree possible.

Should repair initialize m_rtrmap_maxlevels instead of overallocating
in the kernel?
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