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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5BFA1C3A59D for ; Sun, 23 Oct 2022 15:01:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229981AbiJWPBM (ORCPT ); Sun, 23 Oct 2022 11:01:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48600 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229728AbiJWPBK (ORCPT ); Sun, 23 Oct 2022 11:01:10 -0400 X-Greylist: delayed 599 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Sun, 23 Oct 2022 08:01:05 PDT Received: from sphereful.davidgow.net (sphereful.davidgow.net [IPv6:2404:9400:4:0:216:3eff:fee2:5328]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11ADE6DFB9; Sun, 23 Oct 2022 08:01:04 -0700 (PDT) Received: by sphereful.davidgow.net (Postfix, from userid 119) id DDD841C034B; Sun, 23 Oct 2022 22:44:31 +0800 (AWST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=davidgow.net; s=201606; t=1666536271; bh=0N3kW6+aW6yf731DNq7Jvf9k5028oUiR6Y+A1mOBVuM=; h=Date:To:Cc:References:From:Subject:In-Reply-To:From; b=qZQMZXNJVI8cu2fqJ8s+VifEjTH7T+mB7MZIvCMXHV/StTln2AnZaPhSEDAc1k2t7 UN3GwmE4P48z8HXtfUt/F7uhCZ0o/FLz58Zso+Wd61BZYmmy8kivq5SNlSb2xDFKoG gADKguUBGhzY5AyEwQnGdwMB3c2VzeJLZhYg0gyc8vr4U2FoHush59qAyAXy7CMjFH efZ2g9yySnZI8P9XuOftRSHN3/5lcoKphDyCSyIM0U1r5B1Hw3r7FF3dXhsnxxpb6S C81CPnIqYghAzvknZWIWMnTxWA0umNsttWzA91SOWRTOVTN4eZwrJPNUz90UV52Euh 528fAt44KzE8I/kOLDfoElLPg+f9aaY5VCTMfCZwMZ7NBbVQM/OnlXyBR2R6T0lGt9 C3gWiGmdJcdZnfzv+HiWzYL8VaMQLXfsT4F8nzDz5GaE/6sBk85rXTSf2O+imZxMyK Dl4I6XjgvmRjgmG57vn75g7ss4ogXT6KynLOnLJC4Ns0lKPDFUyY0vdduKiQtHFA02 I8jLb2K5yRij+04jE7jhEyt9/MVk+mSZwnxW+YzgypQADGBQOlo1uqH4fMp0UFvUI+ 7YcWlgoqk+Hhu5BYMkTRJoicvLfGWSCYutKBhzUSFzedo+zSxwDs4dppNpVIJqq4qO 5s/6YivG5sKDuefiPG+s4rqg= Received: from [IPV6:2001:8003:8d1e:3000::a57] (unknown [IPv6:2001:8003:8d1e:3000::a57]) by sphereful.davidgow.net (Postfix) with ESMTPSA id 9108C1C032E; Sun, 23 Oct 2022 22:44:26 +0800 (AWST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=davidgow.net; s=201606; t=1666536266; bh=0N3kW6+aW6yf731DNq7Jvf9k5028oUiR6Y+A1mOBVuM=; h=Date:To:Cc:References:From:Subject:In-Reply-To:From; b=J1AOaqB/mQVVbj4/+5Cemtg6Iksw+0uW+e/SPZ0sD7G9xudOd6WV0NctrHT9LKsuN WGEYXbQLI+p/3ArcshYYjJkdMys8iHcL4zVc3hESxSYOCHceSk9eJU4NiTW77rXwWK lqyymSi7n7SOB3Rm+RdjCvi/C3c0SksUYfwop0nzgrvpKp8KQB/icLPNl8+z332T2x U0uNM/C6sGhd5dvlvJ0VfJhXstm/JPZ3pdm3FgV27pUlLmEd09hVMh8BeizDn6frQg 5W+bK15gzCMIhopvDlCeZeOWDyuP09Vx2qviCZ7acHWL+LVl8iyMgJiI6foZe9FTHx LXEbt9jaUekl4vA+kdB0m3vKEsushptELPPmz4lAbSy6M9eezsl0wGVkXc7Kv64sg9 LZrUhi9AqtvYReZBKU2FFxJIiOz2WMvIrifxOajkdcTRl3yt1vdLH+aGdpQzZ3fdMr Rw1eCf2T0FiozSqekcDZelbUnUNZj3FI6jSc89yVgdWP7Ed+yQQQ6Y4jAdxPFj0IUv Ino5abpnEbe0OTA3FotIj/TjafZ3rT+abac6Ks68xMOVkGZLaydFU9E7/0X8t32CD+ SRVZr3AW/dQSO3/5LZQK0U3Y5zEp592DDa3bIdh0lFhZDaVaRfqYtL5gfq7NRh/j+A 1aID6ZM69pPk+Bf6akmP+ilw= Message-ID: <98a8be05-0882-fa8f-846d-b8f74f141041@davidgow.net> Date: Sun, 23 Oct 2022 22:44:22 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.3.3 Content-Language: en-US To: Linus Torvalds , Matthew Wilcox , "Maciej W. Rozycki" Cc: Peter Zijlstra , the arch/x86 maintainers , Yu Zhao , Andrew Morton , Andi Kleen , Aneesh Kumar , Catalin Marinas , Dave Hansen , Hillf Danton , Jens Axboe , Johannes Weiner , Jonathan Corbet , Mel Gorman , Michael Larabel , Michal Hocko , Mike Rapoport , Tejun Heo , Vlastimil Babka , Will Deacon , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, page-reclaim@google.com, Brian Geffon , Jan Alexander Steffens , Oleksandr Natalenko , Steven Barrett , Suleiman Souhlal , Daniel Byrne , Donald Carr , =?UTF-8?Q?Holger_Hoffst=c3=a4tte?= , Konstantin Kharlamov , Shuang Zhai , Sofia Trinh , Vaibhav Jain References: <20220815071332.627393-1-yuzhao@google.com> <20220815071332.627393-9-yuzhao@google.com> From: David Gow Subject: Re: [PATCH v14 08/14] mm: multi-gen LRU: support page table walks In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Le 22/10/22 à 00:50, Linus Torvalds a écrit : > On Thu, Oct 20, 2022 at 8:38 PM Matthew Wilcox wrote: >> On Thu, Oct 20, 2022 at 07:10:46PM -0700, Linus Torvalds wrote: >>> We got rid of i386 support back in 2012. Maybe it's time to get rid of >>> i486 support in 2022? >> Arnd suggested removing i486 last year and got a bit of pushback. >> The most convincing to my mind was Maciej: > Hmm. Maciej added to the cc. > > I suspect we can just say "oh, well, use LTS kernels". > To jump in early on the inevitable pile-on, I'm doing my occasional 32-bit x86 KUnit test runs on an old 486 DX/2. Now, this is _mostly_ just a party trick -- and there are lots of people running 32-bit builds under QEMU et al -- but personally, the only non-amd64-capable x86 machines I have lying around are all 486 class (including a new Vortex86 board). (But, at the very least, I can confirm that the latest torvalds/master does build, run, and pass KUnit tests on a real 486 at the moment.) So while dropping i486 wouldn't affect anything particularly important for me, it'd be a minor inconvenience and make me a bit sad. That being said, I have no objection to dropping support for 486SX CPUs and CONFIG_MATH_EMULATION. Cheers, -- David