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=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_IN_DEF_DKIM_WL 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 E8C07C4CEC4 for ; Thu, 19 Sep 2019 13:39:32 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id AE01121D79 for ; Thu, 19 Sep 2019 13:39:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ieeib4Ap" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AE01121D79 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5C6BB6B035C; Thu, 19 Sep 2019 09:39:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 550CF6B035D; Thu, 19 Sep 2019 09:39:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 43DEC6B035E; Thu, 19 Sep 2019 09:39:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0045.hostedemail.com [216.40.44.45]) by kanga.kvack.org (Postfix) with ESMTP id 1C2346B035C for ; Thu, 19 Sep 2019 09:39:32 -0400 (EDT) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id CCCC11F23E for ; Thu, 19 Sep 2019 13:39:31 +0000 (UTC) X-FDA: 75951777342.05.sort07_360f75f6ab93d X-HE-Tag: sort07_360f75f6ab93d X-Filterd-Recvd-Size: 3366 Received: from mail-yb1-f193.google.com (mail-yb1-f193.google.com [209.85.219.193]) by imf17.hostedemail.com (Postfix) with ESMTP for ; Thu, 19 Sep 2019 13:39:31 +0000 (UTC) Received: by mail-yb1-f193.google.com with SMTP id z7so1349739ybg.0 for ; Thu, 19 Sep 2019 06:39:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=gh9epQbPDXS45t0vdSz30/htyHlI6NEZom/dNuM2sGs=; b=ieeib4ApNmoMaWTclSUxdRd2KtnX6idLkHzrhFUwAyBClrQ4kku9aL9aTofkCcrasC ZVdU1AM4T84Jn4WW5X+mUslTzGyn2RP3kRs453/UtfKoxf7aAByCAWxuuthh01LEZ6XZ pa2A5qr/JT3myBWj7qNoSPvwZce6BFFBGJUfVmzcG83Ee9lzDFFcaYitb65MhoXKye0u jaDkWCeVgEXo2LZ293ZeUnm5tbaDTCqcwbCIsnX7gWIC6hBFMQZsGviDyV18ukHdh5dN 1EvTQ5Aa67fcKxfzhixaPaBbmhZqa+B9X7+YgvKmNFY5gywNqog/UzNZug8NUfp+5eGc C1Kg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=gh9epQbPDXS45t0vdSz30/htyHlI6NEZom/dNuM2sGs=; b=Sp2NI3FVOKAbDvbdVofYEEvHIWHeDPOuTFjyODX0SpOSv2a2ExDLf7cWIWplDMHiJ5 mpiMA6ysGrD71+BoQYax1MYnTKz4Ttcz0dmplRTaKtmMtl/iwErvvfagtnuR0ZF3KuaT 2Lyx7xX0/iW5zT5UglMI1BFpZmfk2u3p9PglAfSPxQQdyRvdWfOF7gUhGHJgerWmEpmU z7PAPz0p+Pfa7r2avm3L0z306gFbuathk+5u90NLcdCOsWWmzrWwCqQR+mJVmTTt0Ys6 FrR+AGqivglrm3eUA5ne62Oet0fShR/B3XECLzeKg+uNepxkgB7Hw6NaAgXwjcMDvIHq 1prA== X-Gm-Message-State: APjAAAW5BPiTEYbRP53M6870+KwxTagtCe61xfR1WzWR6pAeEUG/Xvws EFZzsUcR7svS0hGof4JGqLKzADRF2c33XsjjbRLSFw== X-Google-Smtp-Source: APXvYqyTTjYSC4/xvE4YiMCj3MA7ZD4bi7SRQ4CDsCuRNHidPBrDbCC1madTD9IMdduZjh/1UXDKHeEVxOBAWhjVCFA= X-Received: by 2002:a25:ba8d:: with SMTP id s13mr6638491ybg.332.1568900370326; Thu, 19 Sep 2019 06:39:30 -0700 (PDT) MIME-Version: 1.0 References: <20190905214553.1643060-1-guro@fb.com> In-Reply-To: <20190905214553.1643060-1-guro@fb.com> From: Suleiman Souhlal Date: Thu, 19 Sep 2019 22:39:18 +0900 Message-ID: Subject: Re: [PATCH RFC 00/14] The new slab memory controller To: Roman Gushchin Cc: linux-mm@kvack.org, Michal Hocko , Johannes Weiner , Linux Kernel , kernel-team@fb.com, Shakeel Butt , Vladimir Davydov , Waiman Long Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000004, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Sep 6, 2019 at 6:57 AM Roman Gushchin wrote: > The patchset has been tested on a number of different workloads in our > production. In all cases, it saved hefty amounts of memory: > 1) web frontend, 650-700 Mb, ~42% of slab memory > 2) database cache, 750-800 Mb, ~35% of slab memory > 3) dns server, 700 Mb, ~36% of slab memory Do these workloads cycle through a lot of different memcgs? For workloads that don't, wouldn't this approach potentially use more memory? For example, a workload where everything is in one or two memcgs, and those memcgs last forever. -- Suleiman