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=-15.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 971DAC433B4 for ; Wed, 28 Apr 2021 06:51:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B0D561425 for ; Wed, 28 Apr 2021 06:51:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235859AbhD1GwZ (ORCPT ); Wed, 28 Apr 2021 02:52:25 -0400 Received: from relay.sw.ru ([185.231.240.75]:47972 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229643AbhD1GwX (ORCPT ); Wed, 28 Apr 2021 02:52:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=virtuozzo.com; s=relay; h=Content-Type:MIME-Version:Date:Message-ID:Subject :From; bh=uOkZzTEzLDYGvDz2EcEVr3MAZr7Fo0gfzmPbZqUA8K8=; b=uBHyQL/qzSLGNjtcp4T 9v/VlJZgqAC/tEFcRWoI7drtzee5TyxhPIfWNcyOkZxKw+WAMTByVvWYzQpkMY8GXsHazOKWNhDNX N+9sqff67+7Gp63oLu2FXgScpz7x8CPQDiB6CzA+m3DOWdNUQUGMbnfsO4xmmJ/4Bo5XB1P6gR8= Received: from [10.93.0.56] by relay.sw.ru with esmtp (Exim 4.94) (envelope-from ) id 1lbe2r-001Vi7-OL; Wed, 28 Apr 2021 09:51:37 +0300 From: Vasily Averin Subject: [PATCH v4 01/16] memcg: enable accounting for net_device and Tx/Rx queues To: cgroups@vger.kernel.org, Michal Hocko , Shakeel Butt , Johannes Weiner , Vladimir Davydov Cc: Roman Gushchin , "David S. Miller" , Jakub Kicinski , netdev@vger.kernel.org, linux-kernel@vger.kernel.org References: <8664122a-99d3-7199-869a-781b21b7e712@virtuozzo.com> Message-ID: Date: Wed, 28 Apr 2021 09:51:37 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <8664122a-99d3-7199-869a-781b21b7e712@virtuozzo.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Container netadmin can create a lot of fake net devices, then create a new net namespace and repeat it again and again. Net device can request the creation of up to 4096 tx and rx queues, and force kernel to allocate up to several tens of megabytes memory per net device. It makes sense to account for them to restrict the host's memory consumption from inside the memcg-limited container. Signed-off-by: Vasily Averin --- net/core/dev.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/core/dev.c b/net/core/dev.c index 1f79b9a..87b1e80 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -9994,7 +9994,7 @@ static int netif_alloc_rx_queues(struct net_device *dev) BUG_ON(count < 1); - rx = kvzalloc(sz, GFP_KERNEL | __GFP_RETRY_MAYFAIL); + rx = kvzalloc(sz, GFP_KERNEL_ACCOUNT | __GFP_RETRY_MAYFAIL); if (!rx) return -ENOMEM; @@ -10061,7 +10061,7 @@ static int netif_alloc_netdev_queues(struct net_device *dev) if (count < 1 || count > 0xffff) return -EINVAL; - tx = kvzalloc(sz, GFP_KERNEL | __GFP_RETRY_MAYFAIL); + tx = kvzalloc(sz, GFP_KERNEL_ACCOUNT | __GFP_RETRY_MAYFAIL); if (!tx) return -ENOMEM; @@ -10693,7 +10693,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, /* ensure 32-byte alignment of whole construct */ alloc_size += NETDEV_ALIGN - 1; - p = kvzalloc(alloc_size, GFP_KERNEL | __GFP_RETRY_MAYFAIL); + p = kvzalloc(alloc_size, GFP_KERNEL_ACCOUNT | __GFP_RETRY_MAYFAIL); if (!p) return NULL; -- 1.8.3.1