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=-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,URIBL_BLOCKED, 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 2593FC4338F for ; Tue, 27 Jul 2021 05:34:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0DBAF610E5 for ; Tue, 27 Jul 2021 05:34:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235373AbhG0Fek (ORCPT ); Tue, 27 Jul 2021 01:34:40 -0400 Received: from relay.sw.ru ([185.231.240.75]:40322 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235307AbhG0FeJ (ORCPT ); Tue, 27 Jul 2021 01:34:09 -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=bJzD/4dookOedoazAyDMd9sbQFHTEV2nMBxfajFsEmQ=; b=F8u/2HH6GVK7BiAMTh4 UI0q9Oib8B+Uz/X45qHzhevS+2/memaWtcUC0mj35gZZKWLjzPoRuB3a35oHfiXAwDBEbJm5xB7n1 cATa8GkK6DM+OCyDP17uLbgBNrb0e14qMtnEFih4ZIEPspyMuu+a9O2ZCp/FVbk2VRKJJiSF3iE=; Received: from [10.93.0.56] by relay.sw.ru with esmtp (Exim 4.94.2) (envelope-from ) id 1m8FjE-005LYs-6G; Tue, 27 Jul 2021 08:34:08 +0300 From: Vasily Averin Subject: [PATCH v7 08/10] memcg: enable accounting for posix_timers_cache slab To: Andrew Morton Cc: cgroups@vger.kernel.org, Michal Hocko , Shakeel Butt , Johannes Weiner , Vladimir Davydov , Roman Gushchin , Thomas Gleixner , linux-kernel@vger.kernel.org References: <6f21a0e0-bd36-b6be-1ffa-0dc86c06c470@virtuozzo.com> Message-ID: <57795560-025c-267c-6b1a-dea852d95530@virtuozzo.com> Date: Tue, 27 Jul 2021 08:34:07 +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-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 A program may create multiple interval timers using timer_create(). For each timer the kernel preallocates a "queued real-time signal", Consequently, the number of timers is limited by the RLIMIT_SIGPENDING resource limit. The allocated object is quite small, ~250 bytes, but even the default signal limits allow to consume up to 100 megabytes per user. It makes sense to account for them to limit the host's memory consumption from inside the memcg-limited container. Signed-off-by: Vasily Averin Reviewed-by: Thomas Gleixner --- kernel/time/posix-timers.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c index dd5697d..7363f81 100644 --- a/kernel/time/posix-timers.c +++ b/kernel/time/posix-timers.c @@ -273,8 +273,8 @@ static int posix_get_hrtimer_res(clockid_t which_clock, struct timespec64 *tp) static __init int init_posix_timers(void) { posix_timers_cache = kmem_cache_create("posix_timers_cache", - sizeof (struct k_itimer), 0, SLAB_PANIC, - NULL); + sizeof(struct k_itimer), 0, + SLAB_PANIC | SLAB_ACCOUNT, NULL); return 0; } __initcall(init_posix_timers); -- 1.8.3.1