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=-2.5 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 53DA0C432C1 for ; Tue, 24 Sep 2019 07:48:47 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 21A0320673 for ; Tue, 24 Sep 2019 07:48:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 21A0320673 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id B59796B0006; Tue, 24 Sep 2019 03:48:46 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AE2786B0007; Tue, 24 Sep 2019 03:48:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9D0F36B0008; Tue, 24 Sep 2019 03:48:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0254.hostedemail.com [216.40.44.254]) by kanga.kvack.org (Postfix) with ESMTP id 76AEE6B0006 for ; Tue, 24 Sep 2019 03:48:46 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with SMTP id 0144F824CA39 for ; Tue, 24 Sep 2019 07:48:45 +0000 (UTC) X-FDA: 75969037452.27.pest76_2f630b96d984b X-HE-Tag: pest76_2f630b96d984b X-Filterd-Recvd-Size: 2525 Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Tue, 24 Sep 2019 07:48:45 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id DFE0DB61F; Tue, 24 Sep 2019 07:48:43 +0000 (UTC) Date: Tue, 24 Sep 2019 09:48:43 +0200 From: Michal Hocko To: Andrew Morton Cc: Linus Torvalds , David Rientjes , Vlastimil Babka , Andrea Arcangeli , mm-commits@vger.kernel.org, Linux-MM Subject: Re: incoming Message-ID: <20190924074843.GC23050@dhcp22.suse.cz> References: <20190923153142.a7a7590798baebd3e1531083@linux-foundation.org> <20190923213153.62d56ab13a655aa7e2a583af@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190923213153.62d56ab13a655aa7e2a583af@linux-foundation.org> User-Agent: Mutt/1.10.1 (2018-07-13) 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 Mon 23-09-19 21:31:53, Andrew Morton wrote: > On Mon, 23 Sep 2019 17:55:24 -0700 Linus Torvalds wrote: > > > On Mon, Sep 23, 2019 at 3:31 PM Andrew Morton wrote: > > > > > > - almost all of -mm, as below. > > > > I was hoping that we could at least test the THP locality thing? Is it > > in your queue at all, or am I supposed to just do it myself? > > > > Confused. I saw a privately emailed patch from David which nobody > seems to have tested yet. I parked that for consideration after -rc1. > Or are you referring to something else? > > This thing keeps stalling. It would be nice to push this along and get > something nailed down which we can at least get into 5.4-rc, perhaps > with a backport-this tag? The patch proposed by David is really non trivial wrt. potential side effects. I have provided my review feedback [1] and it didn't get any reaction. I really believe that we need to debug this properly. A reproducer would be useful for others to work on that. There is a more fundamental problem here and we need to address it rather than to duck tape it and whack a mole afterwards. [1] http://lkml.kernel.org/r/20190909193020.GD2063@dhcp22.suse.cz -- Michal Hocko SUSE Labs