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 X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69996C2B9F4 for ; Thu, 17 Jun 2021 16:01:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 357F761057 for ; Thu, 17 Jun 2021 16:01:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231941AbhFQQD7 (ORCPT ); Thu, 17 Jun 2021 12:03:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231626AbhFQQD7 (ORCPT ); Thu, 17 Jun 2021 12:03:59 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41BACC061574 for ; Thu, 17 Jun 2021 09:01:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=XScTWn5QtAay7JKFVwEjUg3s2nuwq8FzX+DQs4OttEA=; b=KF6S14OdCwoy43oM/Xhl54AmTf 6QhcpgI7wkEmDVTOOq9P+2vHDWonpcDWfBBddcFuxJFwOrCTe6jhRMFlHoGoyr9YJ7ypshLDK0Juf 8og/HgiqJRh50LkbQjXN16rElgE2wLTlV4MQJHjsE48dY6EQPdPpha/Ss0uUmxKaZOcAVobl2MYqu glSill+oL/OrhGdDHF+Lk+KiDyuHQvF0wv7oFpYar7NSVMGLskvD/RxE31wejpeGqn8ngqm9eyd1Z Z77uZVy5THhnc5eQxQpj8wopnkOl6g+wYrK9j5+In3zwb0NztDlTgbnrvgqHKCBREx7SkDpQsZyOr ffTlHeNg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1ltuSL-009JIK-Ol; Thu, 17 Jun 2021 16:01:28 +0000 Date: Thu, 17 Jun 2021 17:01:25 +0100 From: Matthew Wilcox To: Rafael Aquini Cc: akpm@linux-foundation.org, hca@linux.ibm.com, kirill.shutemov@linux.intel.com, mm-commits@vger.kernel.org, vbabka@suse.cz, vdavydov.dev@gmail.com, yuzhao@google.com Subject: Re: + mm-mark-idle-page-tracking-as-broken.patch added to -mm tree Message-ID: References: <20210615020547.0bhMmTZsz%akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org On Thu, Jun 17, 2021 at 11:54:31AM -0400, Rafael Aquini wrote: > On Thu, Jun 17, 2021 at 04:37:17PM +0100, Matthew Wilcox wrote: > > On Wed, Jun 16, 2021 at 06:29:19PM -0400, Rafael Aquini wrote: > > > > In discussion with other MM developers around how idle page tracking > > > > should be fixed for transparent huge pages, several expressed the opinion > > > > that it should be removed as it is inefficient at accomplishing the job > > > > that it is supposed to, and we have better mechanisms (eg uffd) for > > > > accomplishing the same goals these days. > > > > > > I didn't follow the aforementioned discussion, so it would be nice to > > > have a little bit more detailed explanation on both points raised here > > > (issues with THP and innefficiency). There are some Red Hat customers > > > and partners that do rely on the feature, thus the interest. Thanks. > > > > It would be nice if you asked this on the original thread (which you're > > cc'd on) instead of starting a new thread. > > Sorry about that, but for some weird reason only Andrew's email made its way > into my inbox. You should probably file a bug with your IT department then. There are a dozen emails cc'ing you in this thread, some from people in your own company: https://lore.kernel.org/linux-mm/20210612000714.775825-1-willy@infradead.org/