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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61EDCC433EF for ; Mon, 11 Oct 2021 08:14:25 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F2BAB600CD for ; Mon, 11 Oct 2021 08:14:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F2BAB600CD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 8B11A900002; Mon, 11 Oct 2021 04:14:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 860D66B0071; Mon, 11 Oct 2021 04:14:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 77687900002; Mon, 11 Oct 2021 04:14:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0042.hostedemail.com [216.40.44.42]) by kanga.kvack.org (Postfix) with ESMTP id 640BC6B006C for ; Mon, 11 Oct 2021 04:14:23 -0400 (EDT) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 251762DEB0 for ; Mon, 11 Oct 2021 08:14:23 +0000 (UTC) X-FDA: 78683444406.04.63BE2BA Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by imf12.hostedemail.com (Postfix) with ESMTP id 526EE1000A89 for ; Mon, 11 Oct 2021 08:14:22 +0000 (UTC) Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4HSWkx3fKQzQj9t; Mon, 11 Oct 2021 16:13:13 +0800 (CST) Received: from dggpeml500005.china.huawei.com (7.185.36.59) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.8; Mon, 11 Oct 2021 16:14:18 +0800 Received: from [10.174.178.155] (10.174.178.155) by dggpeml500005.china.huawei.com (7.185.36.59) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2308.8; Mon, 11 Oct 2021 16:14:17 +0800 To: , , , CC: , , , , , , , , "David Hildenbrand" , , "Wangkefeng (OS Kernel Lab)" From: Yongqiang Liu Subject: [QUESTION] ltp: mavise06 failed when the task scheduled to another cpu Message-ID: <5ed4bc3d-9c30-8cae-e826-b2d0c37c2f6e@huawei.com> Date: Mon, 11 Oct 2021 16:14:16 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.8.0 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed X-Originating-IP: [10.174.178.155] X-ClientProxiedBy: dggeme720-chm.china.huawei.com (10.1.199.116) To dggpeml500005.china.huawei.com (7.185.36.59) X-CFilter-Loop: Reflected X-Rspamd-Queue-Id: 526EE1000A89 X-Stat-Signature: 13xwh84kbze8bsyfbhtzdo1sjncxq1jy Authentication-Results: imf12.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=huawei.com; spf=pass (imf12.hostedemail.com: domain of liuyongqiang13@huawei.com designates 45.249.212.189 as permitted sender) smtp.mailfrom=liuyongqiang13@huawei.com X-Rspamd-Server: rspam06 X-HE-Tag: 1633940062-827275 Content-Transfer-Encoding: quoted-printable 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: Hi, when runing this case in 5.10-lts kernel, it will trigger the folloing=20 failure: =C2=A0...... =C2=A0=C2=A0=C2=A0 madvise06.c:74: TINFO:=C2=A0 memory.kmem.usage_in_byt= es: 1752 Kb =C2=A0=C2=A0=C2=A0 madvise06.c:208: TPASS: more than 102400 Kb were move= d to the swap=20 cache =C2=A0=C2=A0=C2=A0 madvise06.c:217: TINFO: PageFault(madvice / no mem ac= cess): 102401 =C2=A0=C2=A0=C2=A0 madvise06.c:221: TINFO: PageFault(madvice / mem acces= s): 102417 =C2=A0=C2=A0=C2=A0 madvise06.c:82: TINFO: After page access =C2=A0=C2=A0=C2=A0 madvise06.c:84: TINFO:=C2=A0 Swap: 307372 Kb =C2=A0=C2=A0=C2=A0 madvise06.c:86: TINFO:=C2=A0 SwapCached: 101820 Kb =C2=A0=C2=A0=C2=A0 madvise06.c:88: TINFO:=C2=A0 Cached: 103004Kb =C2=A0=C2=A0=C2=A0 madvise06.c:74: TINFO:=C2=A0 memory.kmem.usage_in_byt= es: 0Kb =C2=A0=C2=A0=C2=A0 madvise06.c:225: TFAIL: 16 pages were faulted out of = 2 max and we found that when we call the madvise the task was scheduled to=20 another cpu: ...... tst_res(TINFO, "before madvise MEMLIMIT CPU:%d", sched_getcpu());--->cpu0 TEST(madvise(target, MEM_LIMIT, MADV_WILLNEED)); tst_res(TINFO, "after madvise MEMLIMIT CPU:%d", sched_getcpu());--->cpu1 ...... tst_res(TINFO, "before madvise PASS_THRESHOLDCPU:%d",=20 sched_getcpu());-->cpu1 TEST(madvise(target, PASS_THRESHOLD, MADV_WILLNEED)); tst_res(TINFO, "after madvise PASS_THRESHOLDCPU:%d",=20 sched_getcpu());-->cpu0 ..... Is the PERCPU data swap_slot was not handled well? with the following patch almost fix the error: e9b9734b7465 sched/fair: Reduce cases for active balance 8a41dfcda7a3 sched/fair: Don't set LBF_ALL_PINNED unnecessarily fc488ffd4297 sched/fair: Skip idle cfs_rq but bind the task to a cpu also can solve this problem. Kind regards,