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 A0070C982D2 for ; Fri, 18 Sep 2026 06:40:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7F6D76B008C; Fri, 18 Sep 2026 02:40:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7A7846B0092; Fri, 18 Sep 2026 02:40:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 696CB6B0093; Fri, 18 Sep 2026 02:40:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 420496B008C for ; Fri, 18 Sep 2026 02:40:16 -0400 (EDT) Received: from smtpin28.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id A827CC055D for ; Fri, 18 Sep 2026 06:40:15 +0000 (UTC) X-FDA: 85225933590.28.78C65DC Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf24.hostedemail.com (Postfix) with ESMTP id CDC1B180004 for ; Fri, 18 Sep 2026 06:40:13 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=gr6iWbfN; spf=pass (imf24.hostedemail.com: domain of vbabka@kernel.org designates 172.234.252.31 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=1789713613; 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=hDfUhIaZu4KPqHePo0HBKv6V2o+AaHKMEhi4wd6/0Kw=; b=KXI6PzhcUaaN0Vf4OzzDCuTLGSNyEpvS5gF7ZWv9EaZDGHYJ2omRhPKd67O51JEE+7slM1 XQOb9UqsiNrRQn+YzBQMJWPNr/q5lctDSVBEu6UJUgIdriOWFGYEqSx786uiyoR7/zevYu x6od9TtUer+Ok96UrXipTkSTh759Wpk= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1789713613; b=W5p9fs4HG1ZOLrYmwMBWsa5ljOPeX6QSM8wJI+86aNVEaQDlIdlEflgXXhm9Y8UP1RK/qe Ac4Ho/Y7dHGMJiiiy8x54qyevFoH+NnhpZGIXpQenXQQo4C/rBlxWjelZr35UD8hAi2yF9 2Bl8kzhC6tWA5jtYoOfJGt9khM2q6II= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=gr6iWbfN; spf=pass (imf24.hostedemail.com: domain of vbabka@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=vbabka@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id AB7E940D84; Fri, 18 Sep 2026 06:40:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96D771F000FF; Fri, 18 Sep 2026 06:40:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789713612; bh=hDfUhIaZu4KPqHePo0HBKv6V2o+AaHKMEhi4wd6/0Kw=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=gr6iWbfNeA85FUBO4vzbDmRqzAzqO/U6FyVeujEvSVdtuiMSQXXNP0JJ3mFzxgfxj pQWXc8thrMBiOyfp4JXjDpmnDu0FuuVs99NSQNAVwQTvIoYFpGKuxr+Jce8GRu076W zqPXGkP4aBvOQLE/w+dOcWtZ0KQ1u+DbDPJyuqHfp42X67GKQYTcfpcwjD0tVN9TGn aocNjhWuPZgDolbOCpssn9tVuMGldBcAmIMpOvdlx0Noj9/RAE/8DRuQE1zGdyFBjl nws+0zfzdfG3PL/GpqFg05fhvKhPtsgRAJF/qkvwgGygZtiP3rO0mDqv9JxZrV+h4A mqKeVU6T4oeeg== Message-ID: <23676471-d90c-40cd-a357-e71b3d426425@kernel.org> Date: Fri, 18 Sep 2026 08:40:05 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5] mm/page_alloc: avoid direct compaction for costly __GFP_NORETRY allocations To: Salvatore Dipietro , hannes@cmpxchg.org, akpm@linux-foundation.org Cc: abuehaze@amazon.com, alisaidi@amazon.com, blakgeof@amazon.com, brauner@kernel.org, brendan.jackman@linux.dev, david@redhat.com, dgc@kernel.org, dipietro.salvatore@gmail.com, djwong@kernel.org, hch@infradead.org, hch@lst.de, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, mhocko@suse.com, ritesh.list@gmail.com, rvvandan@amazon.com, stable@vger.kernel.org, surenb@google.com, willy@infradead.org, ziy@nvidia.com References: <20260918063203.2802342-1-dipiets@amazon.it> From: "Vlastimil Babka (SUSE)" Content-Language: en-US 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: <20260918063203.2802342-1-dipiets@amazon.it> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: CDC1B180004 X-Stat-Signature: 49zzr6qy3exjo1c53b4y86y4kp3nm5z9 X-Rspam-User: X-HE-Tag: 1789713613-1081 X-HE-Meta: U2FsdGVkX18l7hSisEm/rJv64/BIHN3bQlk8NQryjbWDFMw6tRUp724oyuDG7b4GCnwqVfzuMd8/3QCoQbZImVMLTPmb8GS+mwC9RIF25NOmloa0yM96ebfRMhl7SDrM93JVNiVyPJM+1Hcq9vTHVwgC+2KhYgjOmanSXY75fVSlkwj3/aMuY2o5awpDARVZgrE//e0wGK37V6bo7NNsLSr6R2TH6fv330ZoeODCYRwC6onzL9k+boxfVZmkTwSJfmXWDgbVWFSX6IvRhfxumlm/oUaOxZXlEJw1V8QvgtxK0ntaktdx9Y2dacqcvEMxVgSk8j0ZLse1Eq+JEAgBNi3rRVT5W3ylgaIJiFPLDVgnkanONJv78uxTcvWTscuZmpO9/mduTYHZuCapl0y/ZV2z7PZdCMRK05BPJFd4I2kEO53JLTXyuIFuNAYRgcJqUZrE+cQ4Y6S4Py+jUq9GEqZCn74/zQMTfGiJaBcF2tA4/s/i43sAdjda0dCUBGWX1TP64GY4gpgXjYxn/eAUC74VD2JVFpN3MREq62FBrfaNPZlFIGv29Bn9Vm4q0SbKpm7hOUj/tNSyz1zIbnDg7AH0zKLm1CjYbL8puKCHMmtEXgSpypEkEddvaBPw+usRZWoMs6HdqdongQejHWIDfztQLklv5v+dxICIgvEmw9sgD2BSaDN/AWqmYOZjFmawQLlyl/GEPBmg91A6TC6LtdLGnOmuCva0LtWpvhzOW0uulFhjDLuLr2r3mdBw5n5ZWstG5GYrEwFc4KA7uXWmxPEZZlMPgZ+oFzFeihF1uoKGk45QBn+d8fvPCALycO+3D4Ofq+WSFPsC2xSbX5j7rivRaoC7jSqCFAsEoP0CqUoH0KCQ9RMeJr/PvKJmGUhYCobxa43F5dT38QHd/3GqYlw6tNcfUL+aA02Q0V4j1IsFccLScXXuzYs8kMwvv7+VfY3ZZWoXQ1O6tTKT/y6 nUBJt0KK 424V6Ln87cKTxFyo1jVwLF7cF7QdFtXNrz7Ma1SosYE/8/2+nXd3IqjsC+2afGBx1BTDFIwa745Jabizyx9f2XlwQo9l/NcoCKywv6QIHgXQqiCG02gKwPEqkejLaidcRc2+tEX4ZHFTEEcuwKM0Q2EITdHjdCo5o0dyRvcx99UhR0nKTHhNvy9vz9s69+Frn5rv2EU/Ad6BCXG4chVRv4g2laDLLP5mh3V+HMjJw49oBgSuY1/105+Dj1Ha/WDoV1ZQ0twPmsdrbHlxdu0geEw0pN92GoVmQgUM2VnUGNXBXiG8dx2WAMKhiDwtwRLR5Tfe2G67NwP3e/DSkWCvgDe/Pi7BcTs/XflypszVNT9Ne6P69Gm2V3YNzbl8N5iWIyf9c Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/18/26 08:32, Salvatore Dipietro wrote: > > On Tue, Sep 15, 2026 at 04:17:00PM +0000, Johannes Weiner wrote: >> It would be possible to remove the costly_order gate here and just >> bail on __GFP_NORETRY. But no strong feelings. > > Will do, I'll drop the costly_order gate and bail on __GFP_NORETRY. > > Andrew, since you dropped v5 and restored v4 in mm-unstable, I'll send a > v6 (v4 plus the above change) unless you'd rather have an incremental > patch on top of v4. Let me know if anything else is needed on my side. v4 is in mm-hotfixes-stable now, so an incremental fix will be easier now I think. > Thanks, > Salvatore > > > > > AMAZON DEVELOPMENT CENTER ITALY SRL, viale Monte Grappa 3/5, 20124 Milano, Italia, Registro delle Imprese di Milano Monza Brianza Lodi REA n. 2504859, Capitale Sociale: 10.000 EUR i.v., Cod. Fisc. e P.IVA 10100050961, Societa con Socio Unico > > >