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 53737C4332F for ; Fri, 18 Nov 2022 22:03:53 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B7C4B6B0072; Fri, 18 Nov 2022 17:03:52 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B2C936B0073; Fri, 18 Nov 2022 17:03:52 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9F4146B0074; Fri, 18 Nov 2022 17:03:52 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 8BEA66B0072 for ; Fri, 18 Nov 2022 17:03:52 -0500 (EST) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 558864085D for ; Fri, 18 Nov 2022 22:03:52 +0000 (UTC) X-FDA: 80147941104.12.485F858 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf26.hostedemail.com (Postfix) with ESMTP id B9B7014000E for ; Fri, 18 Nov 2022 22:03:50 +0000 (UTC) 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 ams.source.kernel.org (Postfix) with ESMTPS id EE6C0B82529; Fri, 18 Nov 2022 22:03:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16EA4C433D7; Fri, 18 Nov 2022 22:03:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1668809027; bh=Pco2YjgEBDyx9sLHVv3YyKsE4hBsiTHYZPbSeBfoGyQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=cWzvVesP4m48eul00BhFVUlNrLgvvD5C8+iW4OwhJugeFob+SxC2SG8+SYDjix3NC Xl6rTkHcRu/Klbh4vCLQY1+fuqsG5mzXbtWTKkVFRzws0MGR5k6nolS9xB7Ikz3cWh 1LNODQ5qGAc5b6wkCmRfQwwJd26A+WHwWjMzm7wM= Date: Fri, 18 Nov 2022 14:03:46 -0800 From: Andrew Morton To: Hugh Dickins Cc: Linus Torvalds , Johannes Weiner , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Vlastimil Babka , Peter Xu , Yang Shi , John Hubbard , Mike Kravetz , Sidhartha Kumar , Muchun Song , Miaohe Lin , Naoya Horiguchi , Mina Almasry , James Houghton , "Zach O'Keefe" , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 0/3] mm,thp,rmap: rework the use of subpages_mapcount Message-Id: <20221118140346.b9026301b4ba03e43e15aeca@linux-foundation.org> In-Reply-To: <93fa81ae-d848-58c2-9f70-27446bf9baa8@google.com> References: <5f52de70-975-e94f-f141-543765736181@google.com> <93fa81ae-d848-58c2-9f70-27446bf9baa8@google.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=cWzvVesP; spf=pass (imf26.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1668809031; a=rsa-sha256; cv=none; b=Biies8Axl4W7k9i8eZsdbSDwA7BfSdBV9DCkUU7WuU2Ojdj8p2tVmvxsIMi4nYhNJpNhbs gJEwqtcQ0npIZEGZxbJgJA67FnVMqcPrVdgfUo5V/2lfAkz8g5puRSdSnwU1s673wVv1SJ ycwoQ2UWxavNGpwLod17wJRN+ueO7XA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1668809031; 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=C9uWIwgx6IXBixCOM+DLoQD4A9IMwHh4gFGgUR7uAZc=; b=qYBeADQTJjJB92P4Spg7ZX/bFxk6E8zCiCti/t27Fr62X/8LeukIjCttiuD5AtLQgFRkb9 kwKyiWbsIt+9NgssM0GlxAwW7rapclkLgzNFZh2VI4kE0SVaCJg285apmlqGgjXCZaV5r0 QKzohlgjQ1LJAchTU32YnNQy0RD+1Y8= Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=cWzvVesP; spf=pass (imf26.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-Rspamd-Server: rspam02 X-Rspam-User: X-Stat-Signature: gki7oiiw1e8mz6mswer74xpan36mz1j6 X-Rspamd-Queue-Id: B9B7014000E X-HE-Tag: 1668809030-309493 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 Fri, 18 Nov 2022 12:51:09 -0800 (PST) Hugh Dickins wrote: > But the first series has not yet graduated from mm-unstable, > so if Andrew and/or Kirill also prefer to have them combined into one > bit_spin_lock-less series, that I can do. (And the end result should be > identical, so would not complicate Johannes's lock_page_memcg() excision.) I'd prefer that approach. It's -rc5 and the earlier "mm,huge,rmap: unify and speed up compound mapcounts" series has had some testing. I'd prefer not to toss it all out and start again.