From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 463ECFF885A for ; Tue, 28 Apr 2026 08:16:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AE3286B0088; Tue, 28 Apr 2026 04:16:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A948D6B008A; Tue, 28 Apr 2026 04:16:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 982B86B008C; Tue, 28 Apr 2026 04:16:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 863E56B0088 for ; Tue, 28 Apr 2026 04:16:48 -0400 (EDT) Received: from smtpin11.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 26DFA1404DF for ; Tue, 28 Apr 2026 08:16:48 +0000 (UTC) X-FDA: 84707258496.11.5F55DD4 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf28.hostedemail.com (Postfix) with ESMTP id 24234C0003 for ; Tue, 28 Apr 2026 08:16:45 +0000 (UTC) Authentication-Results: imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=PKyVwkOQ; spf=pass (imf28.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1777364206; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=ztRiYqyO3M6ha+WMYxGHx4m0P2O/TEO0i21LNk348rU=; b=IUNlcV7W6YE4YlSfoc/IXdE85XKq9GPQgwFFxK1mPTWHr60+K061B1sQSSdC+mge1cpBOU 2ca5OyBSQ4wPOfrzEBKGbC6sMk6m9l9RMlAl0tzf2GsWja79r8ikbMhqs9dNtLWjb07/+T 2oO0OSUDE60wVtRkiTHnCVzmWfmsaGc= ARC-Authentication-Results: i=1; imf28.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=PKyVwkOQ; spf=pass (imf28.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1777364206; a=rsa-sha256; cv=none; b=b3tYGNW0LyNAJnUt1eJ75cQ6nzxa/EECzWtDDK5/Y2zj/Z4pW3Q0uhoYUD9uX2+7Idc+Gx 4Erdm1UezkGRlJ/dWj+i3moao5ZRbyhJeRCfRfERigc+64Qoxhpt5QHIXnuqhLUaZZeD8U 2/XfEsQwWYKtwuOAXKl9jSLkRpcv2cM= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 19F9740112; Tue, 28 Apr 2026 08:16:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A8CE9C2BCAF; Tue, 28 Apr 2026 08:16:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777364199; bh=8AlrguaazRg8WqpeXcLGIY23fI/h23c2cdRwp/9a1k8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=PKyVwkOQIDc94xOW0GulTQ5LSUfSMJABGPdm1wupXTlvPNzIMkBFW3Yj9KJOnWMjS ZzgXT+Yc6lIFlhkdOfz9iUSt4D1XicuxmJom1apMcAAjea/f9lNeCu4IuZ9K+69K9o axYllYt7Rr7KQyCI3u2TuGJkxfp2QMbZ8ZhbkWCZq2XjXyABa41xPRYFjxms12Asup 4c0uKzfLOZJPhcO8AuYf4008tqs4ltgcrZhu+2j8UObP8EM/6i4y/io7Wg2K5gwxxE G70hucMUhNIWrkfwzYUBOLjfKuTdh5to/hZkIBj/aLkmfh3z5GrBk9oG843CnQq7gl +1hpoWv+5Og1w== Message-ID: <2b2eecf0-72f9-4959-9663-c80e3cd0c517@kernel.org> Date: Tue, 28 Apr 2026 10:16:29 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] bpf: arena: use page_ref_count() instead of page_mapped() in arena_free_pages() To: Alexei Starovoitov , Andrew Morton Cc: Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Kumar Kartikeya Dwivedi , Song Liu , Yonghong Song , Jiri Olsa , Lorenzo Stoakes , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Rik van Riel , Harry Yoo , Jann Horn , Matthew Wilcox , "Liam R. Howlett" , linux-sh@vger.kernel.org, LKML , bpf , linux-mm References: <20260427-page_mapped-v1-0-e89c3592c74c@kernel.org> <20260427-page_mapped-v1-2-e89c3592c74c@kernel.org> <20260427051758.e1b714a4b567917971920eaa@linux-foundation.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 24234C0003 X-Stat-Signature: gzhcci38cue766w3rmmdeoqnwfne8q4r X-HE-Tag: 1777364205-207157 X-HE-Meta: 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 wYCV8e/l c6SKaCIOzgSSzTMjWAJbhRqT7WyrY6QGBieIHUr6SPqYxXyb+1eHuzHrJZJqv9YQCPhmMQMLXwf4Qkao+BJAk640ns84KXF+s2MBFnC1nXRC3E1Tj8JSA4xa9JHuaG2P93PEbPLdpUPGcsA1b2P3q8YE/4zxZyCSHNqrXK6gfDLuOAZEomnyFm2CRyuxQ8g/r7+2sIsVkKYwUJmeuA2JjInoyYH6ZCz6K+MVlxF7iTQIWkEegh3OXFEi/1irMvOZ1RgPJ3vklZUW/Q2n2Uu+hcujGyf9fqoIk5L9+iFIJ5fm+xLYvBZBiv+KeOLDoT0fBztYiNQIeyrmBZt1oTCpnIcTbgJb+IUX4KDOVnPj6HU5ThDk7TSF2G+74ONc3/cDyrdmzKGa2zbfvYEK9k2OzS0aJi+nKYADFXVZdf9Cp4TbOsuOvZeLXnb6bxFNCkI4UUCjOX4lKdkfs7tc= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: >>> >>> Signed-off-by: David Hildenbrand (Arm) >>> --- >>> kernel/bpf/arena.c | 2 +- >> >> BPF maintainers will probably want to carry this in the BPF tree. >> That's fine - please go ahead and add it. I'll carry a duplicate in >> mm.git so it compiles. > > We cannot carry the same patch in 2 trees. > Sooner or later it will create problems for linux-next > and issues during merge window if more changes > are done in the same area. > The only way to share a patch between trees is to > create a stable branch and pull it into 2 trees > then sha will be the same, As lack of stable trees was raised a couple of times in the past, once we're done with a transition to a fully git-based mm-next workflow [1], we should be able to provide stable trees. [1] https://lore.kernel.org/r/20260421094216.8dfe14a8c62f2420fa5aace1@linux-foundation.org -- Cheers, David