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=-4.0 required=3.0 tests=BAYES_00,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 2E9A1C433E1 for ; Fri, 24 Jul 2020 11:35:35 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E282C2074A for ; Fri, 24 Jul 2020 11:35:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E282C2074A 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 965628D002C; Fri, 24 Jul 2020 07:35:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 93BD58D0013; Fri, 24 Jul 2020 07:35:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 82AAB8D002C; Fri, 24 Jul 2020 07:35:34 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0230.hostedemail.com [216.40.44.230]) by kanga.kvack.org (Postfix) with ESMTP id 6B3188D0013 for ; Fri, 24 Jul 2020 07:35:34 -0400 (EDT) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 1DACE1730851 for ; Fri, 24 Jul 2020 11:35:34 +0000 (UTC) X-FDA: 77072764188.15.brick96_2c086aa26f47 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin15.hostedemail.com (Postfix) with ESMTP id DEB3A18000DBF for ; Fri, 24 Jul 2020 11:35:33 +0000 (UTC) X-HE-Tag: brick96_2c086aa26f47 X-Filterd-Recvd-Size: 3296 Received: from mail-ed1-f45.google.com (mail-ed1-f45.google.com [209.85.208.45]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Fri, 24 Jul 2020 11:35:33 +0000 (UTC) Received: by mail-ed1-f45.google.com with SMTP id by13so6770758edb.11 for ; Fri, 24 Jul 2020 04:35:33 -0700 (PDT) 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=vQEzWbMpqfBFFfZHk6MrbUvuK+Pg0nDtdn7/73b59ek=; b=uFkVuX7RMHSnLW/+eCfy2V4V2h72VQqg5fFEzFLjkA5HnjA1jsRdJ8ThSIQgPDoYJh wnAUXBwywGCtaiI5OwmzaeIyI8sdfZoPVWxsz5XlTl56uW1AmyGqAf3fDeeFgfucNaN7 Gcxk7C4qN17vuRbqxSq0Z3yIw6hNX8caMq2w+5sYz2ex+FHVf7rDR0MLKoXZm3VWcQeD kpCZk5f2+x2Tvp2+soY2wlLiAdME+xnBnubqyrxYk6xMyXHCCJsYBEEk//qMW6hJWe9A 5ByahQNk9UO6EDJjwrdXmj8LPL2Q1G6NtHAcsI7FoqJHhGZmV1KUHVyIpgAwcsHTzWWU A+rA== X-Gm-Message-State: AOAM533DdnLIFp6DPLuwQsO5HUQ+vk5zLfGVO0JbCj7ONK5MMHSJvTU3 e4nJ1BxEmWDvm9/Dq8ckZhs= X-Google-Smtp-Source: ABdhPJxZeRaF8wBVp/96IA7pcovFXsVEdMc8azrBIuC+gEhhLihno21Zmwh3HzkLSdPLz8P7ONNtPA== X-Received: by 2002:aa7:d90f:: with SMTP id a15mr8235565edr.86.1595590532568; Fri, 24 Jul 2020 04:35:32 -0700 (PDT) Received: from localhost (ip-37-188-169-187.eurotel.cz. [37.188.169.187]) by smtp.gmail.com with ESMTPSA id by20sm499447ejc.119.2020.07.24.04.35.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jul 2020 04:35:31 -0700 (PDT) Date: Fri, 24 Jul 2020 13:35:30 +0200 From: Michal Hocko To: jingrui Cc: "tj@kernel.org" , Lizefan , "hannes@cmpxchg.org" , "vdavydov.dev@gmail.com" , "akpm@linux-foundation.org" , "linux-mm@kvack.org" , "cgroups@vger.kernel.org" , "linux-kernel@vger.kernel.org" , caihaomin , "Weiwei (N)" Subject: Re: =?utf-8?B?562U5aSNOiBQUk9CTEVNOiBjZ3Jv?= =?utf-8?Q?up?= cost too much memory when transfer small files to tmpfs Message-ID: <20200724113530.GH4061@dhcp22.suse.cz> References: <2E04DD7753BE0E4ABABF0B664610AD6F2620CAF7@dggeml528-mbx.china.huawei.com> <20200724075508.GF4061@dhcp22.suse.cz> <2E04DD7753BE0E4ABABF0B664610AD6F2620D4F6@dggeml528-mbx.china.huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2E04DD7753BE0E4ABABF0B664610AD6F2620D4F6@dggeml528-mbx.china.huawei.com> X-Rspamd-Queue-Id: DEB3A18000DBF X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 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 24-07-20 09:35:26, jingrui wrote: > > On Friday, July 24, 2020 3:55 PM, Michal Hocko wrote: > > > What is the reason to run under !root cgroup in those sessions if you do not care about accounting anyway? > > The systemd not support run those sessions under root cgroup, disable > pam-systemd will not create session/cgroup, but this is not safe and make > systemd-logind not work. Could you be more specific please? -- Michal Hocko SUSE Labs