linux-kernel - Re: [PATCH v2 22/29] maple_tree: Use maple copy node for mas_wr

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Message-ID: <bd2b86ff-aa07-437a-82d0-adf49434a925@sirena.org.uk>
Date: Wed, 28 Jan 2026 14:56:12 +0000
From: Mark Brown <broonie@...nel.org>
To: "Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	maple-tree@...ts.infradead.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Suren Baghdasaryan <surenb@...gle.com>,
	Matthew Wilcox <willy@...radead.org>,
	Sidhartha Kumar <sidhartha.kumar@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>, Alice Ryhl <aliceryhl@...gle.com>,
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Arnd Bergmann <arnd@...db.de>,
	Christian Kujau <lists@...dbynature.de>, Aishwarya.TCV@....com
Subject: Re: [PATCH v2 22/29] maple_tree: Use maple copy node for
 mas_wr_rebalance() operation

On Wed, Jan 28, 2026 at 09:36:51AM -0500, Liam R. Howlett wrote:
> * Mark Brown <broonie@...nel.org> [260128 05:53]:

> > # first bad commit: [6ad069085c621d39fad4d1835af7e563975dcf7e] maple_tree: use maple copy node for mas_wr_rebalance() operation

> Thanks for bisecting and the test name (linkat02 on arm64) from ltp, I
> really appreciate the details on this.

> I'm working on a fix.  Please let me know if any other platforms or
> tests showed errors and I'll try them here before it's re-added to
> -next.

I've not noticed anything else showing this, but I'm not running LTP on
anything except arm64 and it wouldn't surprise me if the same test were
to fail on other architectures.  No other reports internally either.

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