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b=YGdI+2R9FW/ddTwpOuFyi3rGk3jJMI1ox3l5oAQJjao1zZVEC+0/rp1bnyj7ntX60 eIZOyAt+aWfeTBDNkH1REVsdADztNI+zAZ4zRvlr93SU4tOTzELH6UcTSVxIexG5N/ iZe/MqVBbqSgKOLnHGzAki1VufZWrw0j2LzQ0zO0JnkRZjUkZiEe+p/TNr2pbFtkhn AYuMFXlVQPCS04zz4VO4i+jZl2T8bEX0IGfRLu1ydr0uslTs/FFKNgtnJg3mzQbxtG hmjS4NVHtEDD3ZEXqdJGoKY6P3b1t+tmpYSWHhax3dXkmmjHJcdY8fGgTpOuxqQ4Ah jlFWfGcCgbR/Q== Message-ID: <58b45d62-37b3-4006-b738-08992f502b58@kernel.org> Date: Tue, 2 Jun 2026 15:16:27 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Process (was Re: [PATCH mm-hotfixes-unstable v18 00/14] khugepaged: add mTHP) collapse support To: "Vlastimil Babka (SUSE)" , Lorenzo Stoakes Cc: 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 References: <20260522150009.121603-1-npache@redhat.com> <506fed6b-8954-40fa-8b5e-c8bd8c0d004b@kernel.org> <589d3c4b-77af-40a3-8506-5b00a5194aff@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 44E9D2000F X-Stat-Signature: wxz8ph6sutwmizf3uukymu4qai48w61w X-Rspam-User: X-Rspamd-Server: rspam12 X-HE-Tag: 1780406192-817448 X-HE-Meta: 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 onFj+yfB j4B5aY/8UFMsSA2P764i4151qlw40SdcZUrlStxyyC9gGj568rmVL/SYfa+jGsw8sk6luce5R0ZB3TqwsUQBShcllSAacLQpvtCG5kbhbq7z4R1LU7YxNHO1fnAHnTD0KN83KqDCvLAV7bvK9YOuLdD3tBSwbscgXv4UZtZwpAExD9yVdk8tF1c1W/NBZD7crKtl5O89chZiDkWFgyLcAgCZ+HtfbxZoqBP9m0IfbAve8PUmVeBuY5kQbuAc9cppv04BE Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 6/2/26 15:08, Vlastimil Babka (SUSE) wrote: > On 6/2/26 14:58, David Hildenbrand (Arm) wrote: >> On 6/2/26 14:47, Vlastimil Babka (SUSE) wrote: >>> >>> The problem is that the patches would not be applied on top of the >>> integration tree, so it doesn't make sense to base them on it in the first >>> place. Unless they target the next cycle, where the integration tree would >>> first become part of rc1, which would be the new base for all the >>> submaintainer trees. >> Why does that matter? > > Well, as longs as there are no conflicts, it probably doesn't. Yes. > >> For example, the slab-next tree gets merged into the mm-next tree. Submitter >> will send against mm-next. >> >> The slab maintainer will cherry-pick the patches on top of slab-next. From where >> they end up in mm-next. > > Note slab-next itself might be a collection of topic branches and it might > be more flexible to create another topic branch (based on rc1) and merge it, > than apply stuff on top of a product of merging. Right, and I assume that the maintainer would then either try to fix it up himself, or ask the submitter to base against a specific branch. (e.g., against another topic branch etc). I assume one can go crazy with topic branches. Fortunately, we can do that incrementally IIUC. > > (I think extreme case if vfs where almost everything is topic branch and > even the PRs to Linus are many separate branches?) Yes, that's also one thing TBD. -- Cheers, David