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Howlett" To: Andrew Morton Cc: Mark Brown , maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Suren Baghdasaryan , Matthew Wilcox , Sidhartha Kumar , Vlastimil Babka , Alice Ryhl , Kuninori Morimoto , Geert Uytterhoeven , Arnd Bergmann , Christian Kujau , Aishwarya.TCV@arm.com Subject: Re: [PATCH v2 22/29] maple_tree: Use maple copy node for mas_wr_rebalance() operation Message-ID: Mail-Followup-To: "Liam R. 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18:16]: > On Tue, 27 Jan 2026 23:05:48 +0000 Mark Brown wrote: > > > On Wed, Jan 21, 2026 at 11:45:19AM -0500, Liam R. Howlett wrote: > > > Stop using the maple big node for rebalance operations by changing to > > > more align with spanning store. The rebalance operation needs its own > > > data calculation in rebalance_data(). > > > > > > In the event of too much data, the rebalance tries to push the data > > > using push_data_sib(). If there is insufficient data, the rebalance > > > operation will rebalance against a sibling (found with rebalance_sib()). > > > > I'm seeing a test failure in the LTP linkat02 test on arm64 which we're > > also seeing on a range of platforms in the Arm lab. A NULL pointer > > deference is generated handling the syscall in the updated code (log for > > the actual next-20260126 commit): > > Cool, thanks. > > Liam, I'll move this series back into mm-new to avoid disrupting > linux-next testing. > > I know you like fixup patches on larger sets, but I've done three things to the patch set now: 1. A small fix for this issue 2. Added a new test in its own patch for this issue 3. Cleaned up the old compiler pointer warning in a more readable way Would you like me to send the delta or a new patch set? Thanks, Liam