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]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4F331C77B6C for ; Thu, 6 Apr 2023 22:25:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id AA2A56B0071; Thu, 6 Apr 2023 18:25:24 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A52A76B0074; Thu, 6 Apr 2023 18:25:24 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 91A736B0078; Thu, 6 Apr 2023 18:25:24 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 7A2206B0071 for ; Thu, 6 Apr 2023 18:25:24 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 4E5AE1C6F29 for ; Thu, 6 Apr 2023 22:25:24 +0000 (UTC) X-FDA: 80652398568.13.3FF6B62 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf08.hostedemail.com (Postfix) with ESMTP id 94A88160005 for ; Thu, 6 Apr 2023 22:25:22 +0000 (UTC) Authentication-Results: imf08.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=Z9GcPeDk; dmarc=none; spf=pass (imf08.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1680819922; 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=POcrBfS5KWYTL3150CQlbiuXIeiUWyNtp77r2d/bEKw=; b=QglitCpkPdqZtyKGUnynODfG9K7L/sjmtX46UjFnS2QnRPi5e6Fo5t2bWgBcUq+fCvEIdE ODhEJ+q73P2Hs46J0ypHRTRZPJkoqNA+Xk1SiiHb1uZyuGpze0uD7WQrOQHXM7GsXjPOKD Yg7lkKQxGgvn4fkfbppmikB/jAJLRs8= ARC-Authentication-Results: i=1; imf08.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=Z9GcPeDk; dmarc=none; spf=pass (imf08.hostedemail.com: domain of akpm@linux-foundation.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1680819922; a=rsa-sha256; cv=none; b=jhw9leZJrgCtFnKiArdkf4EHQ1YjxSjbx5n5p/hCYFpZFJIgBBVLtMM7todQbr4ValDAb0 XPgThiPLU5kCf5xEAgAPrpW+Rom+/KO3m71huSm57TZOeltu4Jv8jqjg6zdoTi34prYibk jVSYry2NtwBLpEqFmaV0/cvtMEHVsDg= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 83C6B64D6E; Thu, 6 Apr 2023 22:25:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A7B5C4339C; Thu, 6 Apr 2023 22:25:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1680819921; bh=POcrBfS5KWYTL3150CQlbiuXIeiUWyNtp77r2d/bEKw=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=Z9GcPeDky5bXJIS5FPZvkZRQLwPX1vosICtCydDasYwnvWQAHXcgHSRK94G7k3PyW HCI+J1rY2pqaZR9VS+XlL7EuXxjy53E3Gg0xsLg+hNRHLWr7FeHfb5GHkFiKaQEVyb 3aR95I7JT6+jddfjG4EZUQKBvbOGbwAw95KQD6hY= Date: Thu, 6 Apr 2023 15:25:19 -0700 From: Andrew Morton To: David Hildenbrand Cc: Yosry Ahmed , Alexander Viro , "Darrick J. Wong" , Christoph Lameter , David Rientjes , Joonsoo Kim , Vlastimil Babka , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, "Matthew Wilcox (Oracle)" , Miaohe Lin , Johannes Weiner , Peter Xu , NeilBrown , Shakeel Butt , Michal Hocko , Yu Zhao , Dave Chinner , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org Subject: Re: [PATCH v5 1/2] mm: vmscan: ignore non-LRU-based reclaim in memcg reclaim Message-Id: <20230406152519.b57c4fb4da75e0b5142de2b0@linux-foundation.org> In-Reply-To: References: <20230405185427.1246289-1-yosryahmed@google.com> <20230405185427.1246289-2-yosryahmed@google.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 94A88160005 X-Stat-Signature: wcu4ki8obt377kyiwctg1yyd4grn7yta X-HE-Tag: 1680819922-520527 X-HE-Meta: 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 536RdN55 An6RnuzfxUQLCwrhYk1gtiBRgB+V23nN13TWO1owVdRFEsTaHpp9S6zFTYHbwIIDWL+BYmIBP8oinhcZQT1WGLNPMHMnLRBJKzZIS/SEeHTzf4BRZ5skjPu+v/wL8Ly9nixqy25WG5Yg7zmBYiYe4fdRH1CxkGzcRm/fFFfrvajPSaJqbaUqipzoDHU3Pk6cGMj4/aqFr35By69laSGQvTgKNZfhqPIYSg/MGd8WL3SBgZIaTpW5Gp1k0dxqsUztIOsOeUDAABEjJoMZbC9dcuGmOmnJBDLfX4NA+wQLm3vTab1wOboO/r3fY+crY8ODCGDL9YY1LY2ElXzvYycK9IOyf60uorQspbjl/dYyO7NpZO+HXllueA5zAFiQxS/aYS/BOCNZspywMGmQuc1PL/b/2YtgsI11DeO7SVXGz7Xvr0lwXaH21PRpv39uwyXzan1W0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, 6 Apr 2023 12:30:56 +0200 David Hildenbrand wrote: > Otherwise it's hard to judge how far to backport this. The case for backporting sounded rather unconvincing to me, which is why I'm still sitting on the v4 series. What are your thoughts on the desirability of a backport? It makes sense to design the forthcoming v6 series for backportability, so that even if we decide "no", others can still take it easily if they wish to.