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t=1780404456; bh=eo5FXpDkFvf14uRPPl1kyUutcnRuZUpz7x68R5KJSPw=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=MgqQihj6pj7h+FldOL4xE3K+YX7gfMJMC94m7JmsVDKATOtUgOhMsUIF9XCO4gWpX lPtI5hv/Tjhnq7enqjIdrLvrNZShTow72KXqnohxh1A3oUCWTrOSrwJcHdRyzuRoFm /Gx3qwF5nTnrAKSLTYyZ6PMmuJS2drAO15CM3Wu13VHvTSCDxcQm2iiQxfnI8vMcP4 /gzYEcTuplhxMjrdHVGX7VZSi5p8snBsI47hOT4M60Z8Yh8rAL8Xb6PVB5mdokBmCo hiojmidCazEdBq7xTsD9JKk/44Rh6uqRzYRsKAgVyAMD7fSLYtxfqVUsVC4y4YL1Jh 9AzmZrYS+zoCQ== Date: Tue, 2 Jun 2026 13:47:30 +0100 From: Lorenzo Stoakes To: "David Hildenbrand (Arm)" Cc: "Vlastimil Babka (SUSE)" , Nico Pache , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, liam@infradead.org, mhocko@suse.com, rppt@kernel.org, vbabka@suse.cz, willy@infradead.org Subject: Re: Process (was Re: [PATCH mm-hotfixes-unstable v18 00/14] khugepaged: add mTHP) collapse support Message-ID: References: <506fed6b-8954-40fa-8b5e-c8bd8c0d004b@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: X-Rspamd-Queue-Id: 237C040017 X-Stat-Signature: fznoabms5qnkfukdgmg77eboo85sb6oi X-Rspamd-Server: rspam03 X-Rspam-User: X-HE-Tag: 1780404457-148466 X-HE-Meta: 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 8gJNdZRA JHs+NLKUUomQfpdO/UnBQ2POce077X/k8EvfYC1HLkLqKN50iCV9BXAVxiPWT3AEfuaIdW+AUKnaHplUFBgTL4Py80Y5wDIFw5subpi70PFkUGhVNq7Ho3qp8RkyVNgwBQo18GzhITB1T2qnZEIrVxBfYk8G0ZS1SMXjTUj3U37U8Oj296QBgqG4QtJJM72RpkrGNQTtwlEFVsIFtJfJlvxaYHW8EAV7bRJGh1mFOhyKc9rKVDxJVUmGMjd8K0r/TuafC4jQjrvBt5ZRUK1AacV6UnQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Jun 02, 2026 at 01:31:35PM +0200, David Hildenbrand (Arm) wrote: > >> learn from obviously) against how mm works in practice. > >> > >> High review load with many overlapping changes might favour a different approach > >> to a subsystem that looks different from that. > > Yeah, but as we said, we discussed, it's all rather complicated and we should > > move incrementally. > > > > Starting to read Documentation/process/maintainer-tip.rst, it's very interesting: > > “The tip tree is both a direct development tree and and an aggregation tree for > several sub-maintainer trees.” > > “In general, development against the head of the tip tree master branch is fine, > but for the subsystems which are maintained separately, have their own git tree > and are only aggregated into the tip tree, development should take place against > the relevant subsystem tree or branch.” Yeah so they have a separate tree model also, so that's an option to learn from as well! > > “Bug fixes which target mainline should always be applicable against the > mainline kernel tree. Potential conflicts against changes which are already > queued in the tip tree are handled by the maintainers.” > > > So, yeah, let me reach out to understand what works, what doesn't work, and how > it works :) Yes 100% :) > > -- > Cheers, > > David Cheers, Lorenzo