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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 E968FC433B4 for ; Fri, 2 Apr 2021 10:39:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C34F0610FC for ; Fri, 2 Apr 2021 10:39:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229924AbhDBKjX (ORCPT ); Fri, 2 Apr 2021 06:39:23 -0400 Received: from zg8tmty1ljiyny4xntqumjca.icoremail.net ([165.227.154.27]:32977 "HELO zg8tmty1ljiyny4xntqumjca.icoremail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S229722AbhDBKjX (ORCPT ); Fri, 2 Apr 2021 06:39:23 -0400 Received: from i-ujjfgxi5.pek3.qingcloud.com (unknown [139.198.0.165]) by mailapp1 (Coremail) with SMTP id A7CowAD3_xdA9GZgBXctAA--.3316S2; Fri, 02 Apr 2021 18:39:17 +0800 (CST) From: Neil Sun To: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Neil Sun Subject: [PATCH] mm/vmscan.c: drop_slab_node with task's memcg Date: Fri, 2 Apr 2021 18:38:54 +0800 Message-Id: <1617359934-7812-1-git-send-email-neilsun@yunify.com> X-Mailer: git-send-email 2.7.4 X-CM-TRANSID: A7CowAD3_xdA9GZgBXctAA--.3316S2 X-Coremail-Antispam: 1UD129KBjvJXoW7urWrCFWkJFWDWFWDGrW5Awb_yoW8Cr48pa y7GFy5JrsYgr1vqrn8Xa1kZ3ySk39rAF1DCF1DZw17C343Cry3Cr1Fyw18ZFyxCayDWF42 kr1Fy3srZwn8AF7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUyl14x267AKxVWUJVW8JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26F4j 6r4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCF04k20xvY0x0EwIxG rwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4 vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr41lIxAIcVC0I7IY x2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26c xKx2IYs7xG6rW3Jr0E3s1lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x02 67AKxVWUJVW8JbIYCTnIWIevJa73UjIFyTuYvjfU5WlkUUUUU X-CM-SenderInfo: xqhlz21xq653pqli5hhfrp/1tbiAQAAClhaKs7qXwAAsY Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch makes shrink_slab() with task's memcg in drop_slab_node(), so we can free reclaimable slab objects belongs to memcg /lxc/i-vbe1u8o7 with following command: cgexec -g memory:/lxc/i-vbe1u8o7 sysctl vm.drop_caches=2 Test with following steps: root@i-yl0pwrt8:~# free -h total used free shared buff/cache available Mem: 62Gi 265Mi 62Gi 1.0Mi 290Mi 61Gi Swap: 31Gi 0B 31Gi root@i-yl0pwrt8:~# (cd /tmp && /root/generate_slab_cache) root@i-yl0pwrt8:~# free -h total used free shared buff/cache available Mem: 62Gi 266Mi 60Gi 1.0Mi 2.2Gi 61Gi Swap: 31Gi 0B 31Gi root@i-yl0pwrt8:~# cgcreate -g memory:/lxc/i-vbe1u8o7 root@i-yl0pwrt8:~# cgexec -g memory:/lxc/i-vbe1u8o7 /root/generate_slab_cache root@i-yl0pwrt8:~# free -h total used free shared buff/cache available Mem: 62Gi 267Mi 58Gi 1.0Mi 4.1Gi 61Gi Swap: 31Gi 0B 31Gi root@i-yl0pwrt8:~# cgexec -g memory:/lxc/i-vbe1u8o7 sysctl vm.drop_caches=2 vm.drop_caches = 2 root@i-yl0pwrt8:~# free -h total used free shared buff/cache available Mem: 62Gi 268Mi 60Gi 1.0Mi 2.2Gi 61Gi Swap: 31Gi 0B 31Gi root@i-yl0pwrt8:~# sysctl vm.drop_caches=2 vm.drop_caches = 2 root@i-yl0pwrt8:~# free -h total used free shared buff/cache available Mem: 62Gi 267Mi 62Gi 1.0Mi 290Mi 61Gi Swap: 31Gi 0B 31Gi Signed-off-by: Neil Sun --- mm/vmscan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 562e87cb..81d770a 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -702,7 +702,7 @@ void drop_slab_node(int nid) return; freed = 0; - memcg = mem_cgroup_iter(NULL, NULL, NULL); + memcg = mem_cgroup_from_task(current); do { freed += shrink_slab(GFP_KERNEL, nid, memcg, 0); } while ((memcg = mem_cgroup_iter(NULL, memcg, NULL)) != NULL); -- 2.7.4