From patchwork Mon Jul 19 10:45:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasily Averin X-Patchwork-Id: 12385311 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=-17.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 29CF5C07E9B for ; Mon, 19 Jul 2021 10:45:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0552A60200 for ; Mon, 19 Jul 2021 10:45:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236529AbhGSKEx (ORCPT ); Mon, 19 Jul 2021 06:04:53 -0400 Received: from relay.sw.ru ([185.231.240.75]:44782 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236641AbhGSKEq (ORCPT ); Mon, 19 Jul 2021 06:04:46 -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=qAU9YX3Sw8E0MYtMB0gH0qiMpEWaFW5TOOeksZRhni0=; b=SE6c3oYcmJx8sAzqC4u CUNi8+qEX4yde9gKyG3niB2I8uj+QshydqASvDrtOyeCz0RuVHPsxG6afRXSLeppQx5A+Z1Bk/N8i 5N6cJz3+5x7WwQ7tlAyNy5/8oACmTBTXA6wRqv+HvAbw1ODVViZtcvbIVPv7Pfkz64r1O9iKjus=; Received: from [10.93.0.56] by relay.sw.ru with esmtp (Exim 4.94.2) (envelope-from ) id 1m5Qm3-004Rgr-5d; Mon, 19 Jul 2021 13:45:23 +0300 From: Vasily Averin Subject: [PATCH v5 10/16] memcg: enable accounting for fasync_cache To: Andrew Morton Cc: cgroups@vger.kernel.org, Michal Hocko , Shakeel Butt , Johannes Weiner , Vladimir Davydov , Roman Gushchin , Alexander Viro , Jeff Layton , "J. Bruce Fields" , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org References: Message-ID: <3315ab04-eb3d-6453-a897-7ed5886454e4@virtuozzo.com> Date: Mon, 19 Jul 2021 13:45:22 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org fasync_struct is used by almost all character device drivers to set up the fasync queue, and for regular files by the file lease code. This structure is quite small but long-living and it can be assigned for any open file. It makes sense to account for its allocations to restrict the host's memory consumption from inside the memcg-limited container. Signed-off-by: Vasily Averin --- fs/fcntl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/fcntl.c b/fs/fcntl.c index dfc72f1..7941559 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -1049,7 +1049,8 @@ static int __init fcntl_init(void) __FMODE_EXEC | __FMODE_NONOTIFY)); fasync_cache = kmem_cache_create("fasync_cache", - sizeof(struct fasync_struct), 0, SLAB_PANIC, NULL); + sizeof(struct fasync_struct), 0, + SLAB_PANIC | SLAB_ACCOUNT, NULL); return 0; }