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 C8909C98309 for ; Wed, 23 Sep 2026 09:39:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 896FE6B0088; Wed, 23 Sep 2026 05:39:53 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 820D36B008A; Wed, 23 Sep 2026 05:39:53 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6C1E26B008C; Wed, 23 Sep 2026 05:39:53 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 428036B0088 for ; Wed, 23 Sep 2026 05:39:53 -0400 (EDT) Received: from smtpin22.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay02.hostedemail.com (Postfix) with ESMTP id AC1BB1206DC for ; Wed, 23 Sep 2026 09:39:52 +0000 (UTC) X-FDA: 85244530224.22.0FC5AED Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf17.hostedemail.com (Postfix) with ESMTP id 0159B40007 for ; Wed, 23 Sep 2026 09:39:50 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=KYr7TIgW; spf=pass (imf17.hostedemail.com: domain of vbabka@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=vbabka@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=1790156391; 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=Ky9c7fQZ/1RFu7l1ztUmuvVnX2EIpcy6aLCf8pDHQ2o=; b=asC6uoV2xvbwgDEcY0mwIuyKnfVS+/41mKnwVyMirNPCGCvRRCGoKQJRvWmOwCcxnJmf/K ZOOdFPgdMb9U9F0QBHlP5+Y8Fr1B8XOXKQYhjaQDldLI6Rqg/nSpOx++MlLu2e4eb4M1fE 0EFZXUN/t315Tx0MqA3xwQNc4vXjSOo= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=KYr7TIgW; spf=pass (imf17.hostedemail.com: domain of vbabka@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1790156391; b=wzvT1r5CYe3r+1JNPFkwpPvBeQAnL8q/kUY8AHSWGvLvyWqydUNIHKVwzEtaIvElBEumgE eud3nkhdzv+pRtb1yoLiTx902JvoaAQ7Bb6Wb6gkaYtydW+7QsRov9NmF6NcfFnSVz5yry o78T3U5EwbOhAChyeHY+hdfBYnJuvcg= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id C7167600AA; Wed, 23 Sep 2026 09:39:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC0771F000FF; Wed, 23 Sep 2026 09:39:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790156389; bh=Ky9c7fQZ/1RFu7l1ztUmuvVnX2EIpcy6aLCf8pDHQ2o=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=KYr7TIgWfrXtSFuYVtPX6VTaibKpRDQE0xLEscffhdhRMZQB3sVyojKDpb3pvYX9a qfvIpI/SixGIFQ7jPSlfRpTXqHoSQw3e5NGtYoZ0sYH3oJ+xqsBI0jpKsys1S/JnYy IvQ5WEYwt2sHjNSrspaH0UnfT4l3XktBqmTgdQkVCWl9XgouOK5HxvYe5u055yDxRe RgCQcXcWZ6Lv0CUhhbVrDCdmnM1DAd3Ix6pJv/92RXmA/nzdCeEya6awHMsihGp3fa 8OzKYVp4CPN2ar8c2+eqMrSU+ghKOu7oofCmSqVM5mgyS2NoW6ndtBPvRSr07sUjNj CvviJRLhMRoaQ== Message-ID: <300f92ef-1526-44d9-a01f-e9b8f3fc0cd1@kernel.org> Date: Wed, 23 Sep 2026 11:39:27 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 00/12] mm: make userland page table freeing RCU-safe Content-Language: en-US To: "David Hildenbrand (Arm)" , "Lorenzo Stoakes (ARM)" Cc: Andrew Morton , Zi Yan , Baolin Wang , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , Usama Arif , Kiryl Shutsemau , Guo Ren , Brian Cain , Geert Uytterhoeven , Dinh Nguyen , Simon Schuster , Jonas Bonn , Stefan Kristiansson , Stafford Horne , Rich Felker , John Paul Adrian Glaubitz , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Russell King , Vineet Gupta , Michal Simek , Chris Zankel , Max Filippov , Will Deacon , "Aneesh Kumar K.V" , Nick Piggin , Peter Zijlstra , "David S. Miller" , Andreas Larsson , Richard Henderson , Matt Turner , Magnus Lindholm , Catalin Marinas , Mark Rutland , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Madhavan Srinivasan , Michael Ellerman , "Christophe Leroy (CS GROUP)" , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Arnd Bergmann , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jason Gunthorpe , John Hubbard , Peter Xu , Yoshinori Sato , Shakeel Butt , Jonathan Corbet , Randy Dunlap , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org, linux-sh@vger.kernel.org, linux-riscv@lists.infradead.org, linux-snps-arc@lists.infradead.org, linux-arch@vger.kernel.org, sparclinux@vger.kernel.org, linux-alpha@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-um@lists.infradead.org, Hugh Dickins , Qi Zheng , linux-doc@vger.kernel.org References: <20260922-rcu-pagetable-freeing-v4-0-fe1ad1f1e303@kernel.org> <20260922160021.a2fc65d05d9b867a141e5457@linux-foundation.org> <9dcde7e4-dadb-4644-9dff-7fd8a26e29a6@kernel.org> <77db2f8f-dfc2-49c6-82f6-8e6c4f7c1fd0@kernel.org> From: "Vlastimil Babka (SUSE)" Autocrypt: addr=vbabka@kernel.org; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSNWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBrZXJuZWwub3JnPsLBsAQTAQoAWhYhBKlA1DSZLC6OmRA9UCJPp+fM gqZkBQJqFFy6GxSAAAAAAAQADm1hbnUyLDIuNSsxLjEyLDIsMgIbAwUJGtCBUAULCQgHAwUV CgkICwUWAgMBAAIeBQIXgAAKCRAiT6fnzIKmZJIUEADFx/tREzUImHrEwVHeSvDFmA7tJysI UVrlvrM09E7GIuzphzv7jYmo8n3ANpCczLEVr4G0syYQdTigaZgv3+FQDIIzhKih1IHhu1Ei XHlywNWKnQxxQEUNi5Mwx43wQz5XVw9F1A7gtKBKNtfogO511hAbrzagrYajyQacEJ/+sfhZ 9Da8ltHIXD8pcYaHUfQgEusCgmEd9+KrUwrTbckFKmYq5chuE6yJ4J0EmWknL096jIE6CnzF FRslQ3B1UKDjxVsm1ZHfir5NeWszLkTvGFsddFaWTgh8UycESG6VQzKXjjewXu2pG7YQYRpj QKm1W5X2TkwWkXRBZTmfmbhxIUMh3+zf5wQ463rSmDN/8v81tdqBtAW6rH/kzg1GvkaTHXn0 507yEHFzBksk2viAuIxxr7km8+/KARYLIdGtx30EG8cKzAUZOK6WqxtNCsXUJNrVE8CWrCaD icoNu7Fs1c5hmPHdSTnU48ce67449DdnO4neLSNhRiGlMHJgfJUmgrxu/hcYeOZ3haWmEQ2w uW1Mh01OHi8QZHCEyAbABrPs9GUgccc/4eYXX9hIgxfSkYzn8f+8NuIFPWl/0uTvjgqU29FQ SbzOLxHq9439Ox40G5mS5eZXRGxITYR+6TXvRGI6P/264jvflnr/pDGUttaikU+0W+1uxgKH cmYbEc7ATQRbGTU1AQgAn0H6UrFiWcovkh6EXVcl+SeqyO6JHOPm+e9Wu0Vw+VIUvXZVUVVQ La1PQDUi6j00ChlcR66g9/V0sPIcSutacPKfdKYOBvzd4rlhL8rfrdEsQw5ApZxrA8kYZVMh FmBRKAa6wos25moTlMKpCWzTH84+WO5+ziCTsTUZASAToz3RdunTD+vQcHj0GqNTPAHK63sf bAB2I0BslZkXkY1RLb/YhuA6E7JyEd2pilZOrIuBGl/5q2qSakgnAVFWFBR/DO27JuAksYnq +aH8vI0xGvwn75KqSk4UzAkDzWSmO4ZHuahKtQgZNsMYV+PGayRBX9b9zbldzopoLBdqHc4n jQARAQABwsF8BBgBCgAmAhsMFiEEqUDUNJksLo6ZED1QIk+n58yCpmQFAmfIHFQFCRYU6J8A CgkQIk+n58yCpmS2PA//bqN1LfcotmArgElsa+0EGZSQlYgK48pm8WAeTXTngudP9IJ4SuKY HR5RNjHcBeqN+Me0zxRqYzRb8nGanHEkDyf4Im8DQM8d6vbyU+FcPmG4skud4kgS1zMHnlVd SXfSIwKC/hKgdHG8aBV7545Lz9X6Iohea+94wneD0aw/hqF+QWewGZhWJriWAZtvEkzNjQOi 4U9F/trLten/x7bpphDSnDMKJtITbtzATT1Dq7o7VpIUK1nCTQALMuMjKCdi8OdU/+V+R3O4 0PXWvX8qrvqYapVbZ+9KqT74FsuB0Ya9uXwgBF2Q6cRuETZk5vqaqKxzqoQZCO8AOz/58j6O 2RHNy/mZEN+7tJ5Tsq42zVJ4jxsT8b9YplavCMsnBgDeRWhcbYhCyttoL7nYISyWg4kQYZ/P wIV3OuNv2f8iKYsxNsRuClOAF82+gvqOy1/1pprFjy8uo2pkoOrb63aOP3vO5VHnRKgra6dq NcaZ+c6J4H+nEJGi2SkHAUJz5oBzuThvPudLvPA/SK8sKoM01IRxSihev/S/5WLazXB1PGem OCbvzC1IjWJJraxiDJ5IygokapUa2RP7+WBR22skQ3SSl6G107QgWKSyTOGWEaRmV53vxQLV jXuCmzSSasTL60zq5yGrT4/DYQVSNEUiUbG4pYekxJujNeEDkUlky0Y= In-Reply-To: <77db2f8f-dfc2-49c6-82f6-8e6c4f7c1fd0@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 0159B40007 X-Rspam-User: X-Stat-Signature: cr6atxhp94gj15dwxztxmd4g1wpf6jqu X-HE-Tag: 1790156390-519178 X-HE-Meta: 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 Gh82Q38r IWTqhNTm3g5T8glWI4MIfhiN7aZwnYp2Sf3C8nVDn8X7gLj5o1j9Q7EUa9s1V+SD/x4VRKTZ7NmSKxyGrRAouM/0mMq9XIrhXw5BSEEwzWksk0kpZdEHmzRvtm4+CO2L1TPzS8dDQ7L2VkJJ0B/xdb3DTzVzxSvLtWUJQj+yP96eqFPRpRJrg1Z2aAgDijKePqCVeeZvSjzybYhqqt9mFm918w4OQDr4vS4lNI7zAxU3NMGXjL5ye++LUQmexpe0FU6wAblquDc7ktiPknkj+0K5SIfRWxl9YMJkNe26lMvLX/r2eoPlSPhO/K6Nxb+8+BaHbNArvHAHBqrU= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/23/26 11:15, David Hildenbrand (Arm) wrote: > On 9/23/26 11:04, Lorenzo Stoakes (ARM) wrote: >> On Wed, Sep 23, 2026 at 10:45:33AM +0200, David Hildenbrand (Arm) wrote: >>> On 9/23/26 01:00, Andrew Morton wrote: >>>> >>>> >>>> Do we have reason to believe that anyone is seeing any effects from >>>> their arch's failure to rcu-free the page tables? >>>> >>>> This sounds like a rather long-standing wart, yes? >>>> >>>> The patchset is thinly reviewed and mm.git is bursting at the seams >>>> again. I'll play wait-and-see on this series. >>> Do we want to nudge arch maintainers to review? >> >> (Just to note that I replied separately, 'thinly reviewed' is incorrect, it's >> been in -next for weeks and the whole thing was reviewed by Kiryl.) > > Ack. > >> >> The only places where that would be useful is m68k motorola, sparc32. >> >> But in any case it has been heavily tested including on every single arch >> listed with stress testing performed (I think I cover that in the cover >> letter). >> >> The changes are not controversial so I don't think that's a blocker, but >> it'd be nice? > > I doubt we'll ever get sparc32 reviews :) > > I'd definitely appreciate some review on the arch bits from arch maintainers, > but if they don't reply within the next weeks I wouldn't wait on that. Indeed, for minor arches like this the lack of review (it would be a whole cycle by the merge window) shouldn't be a blocker for important tree-wide progress.