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[172.10.233.147]) by smtp.gmail.com with ESMTPSA id z11-20020ac8100b000000b003a50ef44a77sm2629849qti.28.2022.11.18.14.10.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Nov 2022 14:10:42 -0800 (PST) Date: Fri, 18 Nov 2022 14:10:32 -0800 (PST) From: Hugh Dickins X-X-Sender: hugh@ripple.attlocal.net To: Andrew Morton cc: Hugh Dickins , 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 In-Reply-To: <20221118140346.b9026301b4ba03e43e15aeca@linux-foundation.org> Message-ID: References: <5f52de70-975-e94f-f141-543765736181@google.com> <93fa81ae-d848-58c2-9f70-27446bf9baa8@google.com> <20221118140346.b9026301b4ba03e43e15aeca@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1668809443; a=rsa-sha256; cv=none; b=lf0INYKwvgNmjdp8VW9yxySFDw4BrcI0Jon6AlfN/su+URpxJSM4XwPPcjkaCIAI2mBSk6 R9dmjRrQryLQwOI+ry0ejuIj2Z0Cie5ZwN2sVzwDbDBVrVREnSBqeQVUzUCxlqOnswpEkf yH+g6o2fjpFaFro6NNB452hE8DhZTEA= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=hoVcNNDU; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf10.hostedemail.com: domain of hughd@google.com designates 209.85.222.175 as permitted sender) smtp.mailfrom=hughd@google.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1668809443; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=tx1YmCzTaRx+0xpO+uSdB0tU1cOLA9kXrIQzKxsMbJ0=; b=0PzD1RwJqmGlM3shFraJWFTUM7Jzz/Toliq2gKDBZljy2VVcrPKO5fbQ0mEzoauYN6s3vq gbIaJAkrFSB1QZFsJckg7iOwJH//KTm7A2BO7+QbCMwn+PRFmp8rUt1jQMuXZV0Lq9kRdc RjTgtfqRz+sWW36/0QQf1FffR0pMPaw= X-Stat-Signature: korgx4tmxmsmhacjjm96d5frfjtmz8cx X-Rspamd-Queue-Id: E4D06C0005 Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=google.com header.s=20210112 header.b=hoVcNNDU; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf10.hostedemail.com: domain of hughd@google.com designates 209.85.222.175 as permitted sender) smtp.mailfrom=hughd@google.com X-Rspam-User: X-Rspamd-Server: rspam12 X-HE-Tag: 1668809443-374118 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, Andrew Morton wrote: > 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. I think you're saying that you prefer the other approach, to keep the two series separate (second immediately after the first, or not, doesn't matter), rather than combined into one bit_spin_lock-less series. Please clarify! Thanks, Hugh > 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.