From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794320041; b=xamPkmsb34oiN0nyoN3tceR8tIx68+0W4qsvlG8VbOQGcWicRWP/jZSc2d8oFw2Uzeu4 RnCbKQ5aA7jT1Fxt3tQv4yYHICAkC+rAzO1QgNFBM4HjYUrSe74OGW84/5Uoqosk6lmsx reKNwAZDNl/AnYi6jzTWGgSXqS4lxUNDs5RqR8CgbgINeDxuWqqJHuokib6BZPongQTDo WfPfTVGtL7RwJIQf9d8X3DP++BUINQBG4EvLxG+IU5YRRTgHu0sqGFGO4Ii2rTOvnJ6ob llKCUOPjtLUXxcLZgeuzNUFTQqjSSQuVX/hlVXBCOC9ptxY0zKlIPlaNaydiAJ/U3gg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794320041; h=Received:DKIM-Signature:Message-ID:Date:MIME-Version:User-Agent: Subject:Content-Language:To:Cc:References:From:Autocrypt:In-Reply-To: Content-Type:Content-Transfer-Encoding; bh=Ivmt603po3d3E2NVVoR2W5ORstU9Dg9rTKeWn3hg5so=; b=eBC+rz4ytBZNY7R6ixW2MZymLDkbxu0KEn9XxwDt64js9GNMzC7ALSW5dNjkBIh8iw4r OCkGuYlg+uB8+o0ZmSJWGi3p5jbWZglf/5VM8eukoBbJpHLvwAPOhenYGoSnxpYNKGnAu 0RsX9xl5ILPT9GyqfgDnmlPQqn/ht6r5TEsuTRuBrvckUU3UFxS45+bVQenH8nAzETFRZ Uky+R8ISw4Nu8HxlY6GkgGwb32ppFDNAPit3mcfkVHrF9aNyCA4x3u2kQgbfqXRbYJgbq axA6YJwcasEuZ4CjS/PcurGi5cv1qOtvlRLE+dJw1GxhjKUqm40wGSz65COAwLwDtoA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=jir9xEzU; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8AE85606A337; Tue, 10 Nov 2026 14:14:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=jir9xEzU Received: by smtp.kernel.org (Postfix) with ESMTPSA id BABAB1F008A2; Tue, 10 Nov 2026 14:13:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794320041; bh=Ivmt603po3d3E2NVVoR2W5ORstU9Dg9rTKeWn3hg5so=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=jir9xEzUa4uLP6tZoo+roz29YPgHORGT7V/V/D0xiwZU22ph1bKqdE78bL0dNUGNn lFjpngEiey7fMGra+q9S1NVnzbVDfEa7ZX6SIR4ff+lX3FoZSGG3Puhw/Xfa6DNGRQ LotPXVBtzyYJp6lYcrWSWcqKarHVtWVzf0rqc9qS3upIUt3nohdWAqM4PwxQc1V6SM +19rn4gp0RTNUmTnPFVJwmO3t84ctQpVwvZKxojsQG2ocpZume8rk9otqAe2Ew5pgr ZWh+i2qSW2Us59HlS0PjLklxdNYwS2RSwuT7xFbetacDE/MWvsUkxPw6o3gdc9TcPd fPf9OqmV1ukyg== Message-ID: <0a850ec1-d45d-463e-829a-e782290ef864@kernel.org> Date: Tue, 10 Nov 2026 15:13:53 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/2] mm/compaction: stop repeating failed async compaction on every THP fault Content-Language: en-US To: Qiliang Yuan , Johannes Weiner Cc: Andrew Morton , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Baolin Wang , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Brendan Jackman , Zi Yan , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org References: <20261102-bug-mm-thp-async-compact-defer-v2-0-b407e974db54@gmail.com> <20261110135824.3264904-1-qiliang.yuan@linux.dev> 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: <20261110135824.3264904-1-qiliang.yuan@linux.dev> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/10/26 14:58, Qiliang Yuan wrote: > Hi Vlastimil, Johannes, > > Could you share your view on this series when you have time? The series was nacked twice by senior maintainers. Due to dealing with urgent issues [1] we might perhaps find time later to see if it reports a real issue, and in that case fix it ourselves. We have currently no time to help those who need AI assistance to contribute instead of having own knowledge. [1] https://lore.kernel.org/linux-mm/a2f584f6-e382-4876-aa6d-d5a34de6ee59@kernel.org/ > One known issue in v2: the cc->mode != MIGRATE_ASYNC check added to > 2/2 blocks clearing stale skip hints once sync compaction is fully > deferred, so local THP may not recover after the pins are released. > I'd drop it in v3, but won't send one before hearing from you. > > Thanks, > Qiliang