From nobody Tue Dec 16 23:50:00 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32621C2FC1A for ; Thu, 17 Aug 2023 12:49:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350963AbjHQMsx (ORCPT ); Thu, 17 Aug 2023 08:48:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40852 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350970AbjHQMs0 (ORCPT ); Thu, 17 Aug 2023 08:48:26 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 95F402D62 for ; Thu, 17 Aug 2023 05:47:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1692276458; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type; bh=27yOpoFS3kI6hX/wnm/PheNvRJtvVh2pmNTKVNiCv/U=; b=ZOkRhSn/zCJWcaEisK/qx2UpX15Sx4auUstXw/GHstn97CqFEYjaHyX/RWMZJPuFjdKRyH SfQYuIIfvAcwxfIToW8nvpceMQb26XWRF/Dz0rd0RApTik9n7gh+Mn3C5hpXiffsNiKgCf 49aiFf9Npte/MwMxJw5zZuovI9hiYEA= Received: from mail-qk1-f197.google.com (mail-qk1-f197.google.com [209.85.222.197]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-610-7YW3IUyoPI-PZ0oQ_a9gBw-1; Thu, 17 Aug 2023 08:47:37 -0400 X-MC-Unique: 7YW3IUyoPI-PZ0oQ_a9gBw-1 Received: by mail-qk1-f197.google.com with SMTP id af79cd13be357-76d70d17e58so222812085a.2 for ; Thu, 17 Aug 2023 05:47:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692276457; x=1692881257; h=user-agent:content-disposition:mime-version:message-id:subject:cc :to:from:date:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=27yOpoFS3kI6hX/wnm/PheNvRJtvVh2pmNTKVNiCv/U=; b=F3AGadGLI5yFVh6LiIUYcRfBs7J80CI8C3tqsPKUc15GiD57KfkKbtShPOWz7qjcCJ Pf6E6UfmdfgihJbis1yXTA+KuJx3gPy73y1l3ASsK96xehGKEiKRn4IJWO/GGy9fUc7M AD5EzclZGxoMH5LljUzEKf9UBzVsT4Kx2l4uqfVNY5HO33hV3aJWJvbfNQ0MOJjBq0qx /nD2UtR3VpJ6gLFh5UolKkSk1Ij4Y8X+tm9v3zjUPPf6GytqVtakd6q80S3FHQ7iBAZf wQPVcTHHQs36c+p7ewbwadKNzpbHlelTbrDoSyeeXsnSlTrF36moYofXL4UaqT3nAhCD /qew== X-Gm-Message-State: AOJu0YxWwvGg0UOwFyzXonb1brNiEkgl7o0HD3qybdAsSriB1SgcdywL YduIyimu6e8wXblK0lvDHbar2LrkRrtZHBML7ry6+l4Yw34HRcfazkEdoFxtUor4tTpLI2PgtWy IGaWTzMJvbU3wlglVpCCEUQLd X-Received: by 2002:a05:620a:45a6:b0:76c:b43e:8f1d with SMTP id bp38-20020a05620a45a600b0076cb43e8f1dmr5898063qkb.25.1692276456908; Thu, 17 Aug 2023 05:47:36 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHWut8Xykqo3qs/+z94GUgQ9h0MTPjPde/T7jPTNAC5kZOXlJnFvxDHlaQ9P4SPc1KB12mEfA== X-Received: by 2002:a05:620a:45a6:b0:76c:b43e:8f1d with SMTP id bp38-20020a05620a45a600b0076cb43e8f1dmr5898038qkb.25.1692276456669; Thu, 17 Aug 2023 05:47:36 -0700 (PDT) Received: from fedora ([174.89.37.104]) by smtp.gmail.com with ESMTPSA id j7-20020a37c247000000b0076cc4610d0asm5128353qkm.85.2023.08.17.05.47.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Aug 2023 05:47:36 -0700 (PDT) Date: Thu, 17 Aug 2023 08:47:26 -0400 From: Lucas Karpinski To: Andrew Morton , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Tejun Heo , Zefan Li , Shuah Khan Cc: Muchun Song , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] selftests: cgroup: fix test_kmem_memcg_deletion kernel mem check Message-ID: MIME-Version: 1.0 Content-Disposition: inline User-Agent: NeoMutt/20230517 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The combination of using slab, anon, file, kernel_stack, and percpu is not accurate for total kernel memory utilization. Checking kernel within memory.stat provides a more accurate measurement. Signed-off-by: Lucas Karpinski --- v1: https://lore.kernel.org/all/eex2vdlg4ow2j5bybmav73nbfzuspkk4zobnk7svua= 4jaypqb5@7ie6e4mci43t/ tools/testing/selftests/cgroup/test_kmem.c | 25 +++++----------------- 1 file changed, 5 insertions(+), 20 deletions(-) diff --git a/tools/testing/selftests/cgroup/test_kmem.c b/tools/testing/sel= ftests/cgroup/test_kmem.c index ed2e50bb1e76..3ef979ee0edf 100644 --- a/tools/testing/selftests/cgroup/test_kmem.c +++ b/tools/testing/selftests/cgroup/test_kmem.c @@ -166,7 +166,7 @@ static int cg_run_in_subcgroups(const char *parent, */ static int test_kmem_memcg_deletion(const char *root) { - long current, slab, anon, file, kernel_stack, pagetables, percpu, sock, s= um; + long current, kernel; int ret =3D KSFT_FAIL; char *parent; =20 @@ -184,30 +184,15 @@ static int test_kmem_memcg_deletion(const char *root) goto cleanup; =20 current =3D cg_read_long(parent, "memory.current"); - slab =3D cg_read_key_long(parent, "memory.stat", "slab "); - anon =3D cg_read_key_long(parent, "memory.stat", "anon "); - file =3D cg_read_key_long(parent, "memory.stat", "file "); - kernel_stack =3D cg_read_key_long(parent, "memory.stat", "kernel_stack "); - pagetables =3D cg_read_key_long(parent, "memory.stat", "pagetables "); - percpu =3D cg_read_key_long(parent, "memory.stat", "percpu "); - sock =3D cg_read_key_long(parent, "memory.stat", "sock "); - if (current < 0 || slab < 0 || anon < 0 || file < 0 || - kernel_stack < 0 || pagetables < 0 || percpu < 0 || sock < 0) + kernel =3D cg_read_key_long(parent, "memory.stat", "kernel "); + if (current < 0 || kernel < 0) goto cleanup; =20 - sum =3D slab + anon + file + kernel_stack + pagetables + percpu + sock; - if (abs(sum - current) < MAX_VMSTAT_ERROR) { + if (abs(kernel - current) < MAX_VMSTAT_ERROR) { ret =3D KSFT_PASS; } else { printf("memory.current =3D %ld\n", current); - printf("slab + anon + file + kernel_stack =3D %ld\n", sum); - printf("slab =3D %ld\n", slab); - printf("anon =3D %ld\n", anon); - printf("file =3D %ld\n", file); - printf("kernel_stack =3D %ld\n", kernel_stack); - printf("pagetables =3D %ld\n", pagetables); - printf("percpu =3D %ld\n", percpu); - printf("sock =3D %ld\n", sock); + printf("kernel =3D %ld\n", kernel); } =20 cleanup: --=20 2.41.0