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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 E703BC2BA19 for ; Thu, 9 Apr 2020 17:56:49 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A5049206E9 for ; Thu, 9 Apr 2020 17:56:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chrisdown.name header.i=@chrisdown.name header.b="BtsXpXg+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A5049206E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chrisdown.name Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2CD678E000D; Thu, 9 Apr 2020 13:56:49 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2568C8E0006; Thu, 9 Apr 2020 13:56:49 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0F7678E000D; Thu, 9 Apr 2020 13:56:49 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0150.hostedemail.com [216.40.44.150]) by kanga.kvack.org (Postfix) with ESMTP id 001D78E0006 for ; Thu, 9 Apr 2020 13:56:48 -0400 (EDT) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id C7325181AEF31 for ; Thu, 9 Apr 2020 17:56:48 +0000 (UTC) X-FDA: 76689072096.23.cast76_139255b78356 X-HE-Tag: cast76_139255b78356 X-Filterd-Recvd-Size: 3347 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) by imf31.hostedemail.com (Postfix) with ESMTP for ; Thu, 9 Apr 2020 17:56:48 +0000 (UTC) Received: by mail-wm1-f42.google.com with SMTP id e26so648324wmk.5 for ; Thu, 09 Apr 2020 10:56:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chrisdown.name; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=RE3VHE0rvREJWCVJmNBX2NQs76M9qqKu6sqBlBeuyf4=; b=BtsXpXg+oW5k/lZe16X3+KqOuDsPyI7Qm6wWMejyMZQuO/VQYg+545plGEu1Cc1V25 GZNWzHCYU3sVNveqreKBmg8RIAMWW17b4w4QjsF25Zajw3P/0myBLGQaKzocj83iDYfQ pQuDN4LU0guMN2eu2NxN0YceZOeQ8Q9sufPYo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=RE3VHE0rvREJWCVJmNBX2NQs76M9qqKu6sqBlBeuyf4=; b=g6L5IbWdhM5Xh0u6csNg4yxE/PRU2Dse5S7XrtGPVmJKhMKATbYoye+CJbn9Q+TPRg WzwJXwpB5SRD/Au5QuP4gkkWCxFvgpGlAtJaRLAYN7/eH5Ex+thQ8XfbxTTpoR3a4wBJ Yvtr563NpDkpL3It+tMCujWq5RnhcedevhCElLHRpAwr598TUEKEyjsYwvC8BZfA+SwF hzdInY9YOhaSKjPWzayDnYYo5q3Qpuqb1gJlMbnoW4hvgmpMCWGewseTlgEO+il52UVy 9Qz3IeT5uAVoVvdBWZxjEBFj6u11Gw3pJIX4w1kpQpc6wqJdfmbmdpQrKVTwIGOjq89C QQbQ== X-Gm-Message-State: AGi0PuZbYQ1m4S0IWq+pbopIqihLzjgPJXl2OaULLxyCGFP6JKwhorlL Ja+06g2tKXRo4BJUHb8hkc01lw== X-Google-Smtp-Source: APiQypJVtJjnh4GpoLFWOVI8MNs/ogBJoEpqIUzzkJxRdXxH49inFhFbvBInfgo+rfxOsOpJ46n3Nw== X-Received: by 2002:a05:600c:2284:: with SMTP id 4mr995515wmf.103.1586455007180; Thu, 09 Apr 2020 10:56:47 -0700 (PDT) Received: from localhost ([2620:10d:c092:180::1:9ebe]) by smtp.gmail.com with ESMTPSA id s6sm4565956wmh.17.2020.04.09.10.56.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Apr 2020 10:56:46 -0700 (PDT) Date: Thu, 9 Apr 2020 18:56:46 +0100 From: Chris Down To: Bruno =?iso-8859-1?Q?Pr=E9mont?= Cc: Michal Hocko , cgroups@vger.kernel.org, linux-mm@kvack.org, Johannes Weiner , Vladimir Davydov Subject: Re: Memory CG and 5.1 to 5.6 uprade slows backup Message-ID: <20200409175646.GD1040020@chrisdown.name> References: <20200409112505.2e1fc150@hemera.lan.sysophe.eu> <20200409094615.GE18386@dhcp22.suse.cz> <20200409121733.1a5ba17c@hemera.lan.sysophe.eu> <20200409103400.GF18386@dhcp22.suse.cz> <20200409170926.182354c3@hemera.lan.sysophe.eu> <20200409152417.GB1040020@chrisdown.name> <20200409174042.2a3389ba@hemera.lan.sysophe.eu> <20200409175044.GC1040020@chrisdown.name> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20200409175044.GC1040020@chrisdown.name> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000806, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From my side, this looks like memory.high is working as intended and there is some other generic problem with reclaim happening here. I think the data which Michal asked for would help a lot to narrow down what's going on.