From nobody Thu May 7 20:50:12 2026 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 E44F6C433F5 for ; Wed, 18 May 2022 15:41:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239555AbiERPlB (ORCPT ); Wed, 18 May 2022 11:41:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239494AbiERPkx (ORCPT ); Wed, 18 May 2022 11:40:53 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E80672CE2C; Wed, 18 May 2022 08:40:48 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 5530421B98; Wed, 18 May 2022 15:40:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1652888447; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KUNLA0b9x+opMHbbbhr08H0E2VJuSYLLBACnTDB2Dic=; b=UqYoUqb5nJc9EZ77jyiai+SjiEo9dhFuOX2NLDKRFVWPUDk+UcCDOftCF3sUPcMN80I5TJ ydA8ZJI4nSn9qJjMjijjmjZoeM0OLgVz95mOuhE7ewMGEIRHfWg1IKVNzOXdUGeQX9xpMm hD6Vh0aq5kSs2cIpoS2dTSF0kn8/eaU= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 2844A13ADC; Wed, 18 May 2022 15:40:47 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id sBz4CH8ThWJDUgAAMHmgww (envelope-from ); Wed, 18 May 2022 15:40:47 +0000 From: =?UTF-8?q?Michal=20Koutn=C3=BD?= To: cgroups@vger.kernel.org, linux-mm@kvack.org Cc: Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Richard Palethorpe Subject: [PATCH 1/4] selftests: memcg: Fix compilation Date: Wed, 18 May 2022 17:40:34 +0200 Message-Id: <20220518154037.18819-2-mkoutny@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220518154037.18819-1-mkoutny@suse.com> References: <20220518154037.18819-1-mkoutny@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This fixes mis-applied changes from commit 72b1e03aa725 ("cgroup: account for memory_localevents in test_memcg_oom_group_leaf_events()"). Signed-off-by: Michal Koutn=C3=BD --- .../selftests/cgroup/test_memcontrol.c | 25 +++++++++++-------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testi= ng/selftests/cgroup/test_memcontrol.c index 6ab94317c87b..4958b42201a9 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -1241,7 +1241,16 @@ static int test_memcg_oom_group_leaf_events(const ch= ar *root) if (cg_read_key_long(child, "memory.events", "oom_kill ") <=3D 0) goto cleanup; =20 - if (cg_read_key_long(parent, "memory.events", "oom_kill ") <=3D 0) + parent_oom_events =3D cg_read_key_long( + parent, "memory.events", "oom_kill "); + /* + * If memory_localevents is not enabled (the default), the parent should + * count OOM events in its children groups. Otherwise, it should not + * have observed any events. + */ + if (has_localevents && parent_oom_events !=3D 0) + goto cleanup; + else if (!has_localevents && parent_oom_events <=3D 0) goto cleanup; =20 ret =3D KSFT_PASS; @@ -1349,20 +1358,14 @@ static int test_memcg_oom_group_score_events(const = char *root) if (!cg_run(memcg, alloc_anon, (void *)MB(100))) goto cleanup; =20 - parent_oom_events =3D cg_read_key_long( - parent, "memory.events", "oom_kill "); - /* - * If memory_localevents is not enabled (the default), the parent should - * count OOM events in its children groups. Otherwise, it should not - * have observed any events. - */ - if ((has_localevents && parent_oom_events =3D=3D 0) || - parent_oom_events > 0) - ret =3D KSFT_PASS; + if (cg_read_key_long(memcg, "memory.events", "oom_kill ") !=3D 3) + FAIL(cleanup); =20 if (kill(safe_pid, SIGKILL)) goto cleanup; =20 + ret =3D KSFT_PASS; + cleanup: if (memcg) cg_destroy(memcg); --=20 2.35.3 From nobody Thu May 7 20:50:12 2026 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 051B7C4332F for ; Wed, 18 May 2022 15:41:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239587AbiERPlI (ORCPT ); Wed, 18 May 2022 11:41:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239506AbiERPkx (ORCPT ); Wed, 18 May 2022 11:40:53 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 225A32CE38; Wed, 18 May 2022 08:40:49 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 8847D21B9B; Wed, 18 May 2022 15:40:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1652888447; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0s4UvaoqQhOvXVFcayQAcYm+9aULoAvV0U7raXaG3hU=; b=ek3UJfEiUiPLsUwTz+kfxjgpe/oHTGh7t+lQgpppq4VT7NQCfgWzI8gtDKPoJHVxEePsbd jGjBVmrou19eu2/eV7hu9/gxOzYZRFHFdYa8vSEJ8HhK2TRPIVPr2GH0S09LOiCBot39FG tQFeGy3tPwfWGummxk34KWZtUrQKrEE= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 5831213A6D; Wed, 18 May 2022 15:40:47 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id gL+rFH8ThWJDUgAAMHmgww (envelope-from ); Wed, 18 May 2022 15:40:47 +0000 From: =?UTF-8?q?Michal=20Koutn=C3=BD?= To: cgroups@vger.kernel.org, linux-mm@kvack.org Cc: Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Richard Palethorpe Subject: [PATCH 2/4] selftests: memcg: Expect no low events in unprotected sibling Date: Wed, 18 May 2022 17:40:35 +0200 Message-Id: <20220518154037.18819-3-mkoutny@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220518154037.18819-1-mkoutny@suse.com> References: <20220518154037.18819-1-mkoutny@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is effectively a revert of commit cdc69458a5f3 ("cgroup: account for memory_recursiveprot in test_memcg_low()"). The case test_memcg_low will fail with memory_recursiveprot until resolved in reclaim code. However, this patch preserves the existing helpers and variables for later uses. Signed-off-by: Michal Koutn=C3=BD --- tools/testing/selftests/cgroup/test_memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testi= ng/selftests/cgroup/test_memcontrol.c index 4958b42201a9..eba252fa64ac 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -528,7 +528,7 @@ static int test_memcg_low(const char *root) } =20 for (i =3D 0; i < ARRAY_SIZE(children); i++) { - int no_low_events_index =3D has_recursiveprot ? 2 : 1; + int no_low_events_index =3D 1; =20 oom =3D cg_read_key_long(children[i], "memory.events", "oom "); low =3D cg_read_key_long(children[i], "memory.events", "low "); --=20 2.35.3 From nobody Thu May 7 20:50:12 2026 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 141A3C43217 for ; Wed, 18 May 2022 15:41:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239609AbiERPlN (ORCPT ); Wed, 18 May 2022 11:41:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239509AbiERPkx (ORCPT ); Wed, 18 May 2022 11:40:53 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 46AD52E9C2; Wed, 18 May 2022 08:40:49 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id BB77A1F8CD; Wed, 18 May 2022 15:40:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1652888447; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=p/VfT98eDaSoE5VMKiC0q6OouDpijrF5gH7LM1N1KeA=; b=k2d+vXCBAm/e+L/WEhM4ig/Az5Mm4+rmJrHEMYxxue2I23dt8xecICNQ2v5ID3l+LK6epR awB4numSb8SgyTXxoNR0VrKF0ze7zsp6jXtQKezfLUuWVv/S6BgX1aYtPu9KNvFtOnQ+8y tiE8oXjgMdidP4GubiG3j7iSm0CF/A0= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 8BE4013ADC; Wed, 18 May 2022 15:40:47 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id EKYKIX8ThWJDUgAAMHmgww (envelope-from ); Wed, 18 May 2022 15:40:47 +0000 From: =?UTF-8?q?Michal=20Koutn=C3=BD?= To: cgroups@vger.kernel.org, linux-mm@kvack.org Cc: Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Richard Palethorpe Subject: [PATCH 3/4] selftests: memcg: Adjust expected reclaim values of protected cgroups Date: Wed, 18 May 2022 17:40:36 +0200 Message-Id: <20220518154037.18819-4-mkoutny@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220518154037.18819-1-mkoutny@suse.com> References: <20220518154037.18819-1-mkoutny@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The numbers are not easy to derive in a closed form (certainly mere protections ratios do not apply), therefore use a simulation to obtain expected numbers. The new values make the protection tests succeed more precisely. % run as: octave-cli script % % Input configurations % ------------------- % E parent effective protection % n nominal protection of siblings set at the givel level % c current consumption -,,- % example from testcase (values in GB) E =3D 50 / 1024; n =3D [75 25 0 500 ] / 1024; c =3D [50 50 50 0] / 1024; % Reclaim parameters % ------------------ % Minimal reclaim amount (GB) cluster =3D 32*4 / 2**20; % Reclaim coefficient (think as 0.5^sc->priority) alpha =3D .1 % Simulation parameters % --------------------- epsilon =3D 1e-7; timeout =3D 1000; % Simulation loop % --------------------- % Simulation assumes siblings consumed the initial amount of memory (w/out % reclaim) and then the reclaim starts, all memory is reclaimable, i.e. tr= eated % same. It simulates only non-low reclaim and assumes all memory.min =3D 0. ch =3D []; eh =3D []; rh =3D []; for t =3D 1:timeout % low_usage u =3D min(c, n); siblings =3D sum(u); % effective_protection() protected =3D min(n, c); % start with nominal e =3D protected * min(1, E / siblings); % normalize overcommit % recursive protection unclaimed =3D max(0, E - siblings); parent_overuse =3D sum(c) - siblings; if (unclaimed > 0 && parent_overuse > 0) overuse =3D max(0, c - protected); e +=3D unclaimed * (overuse / parent_overuse); endif % get_scan_count() r =3D alpha * c; % assume all memory is in a single LRU list % commit 1bc63fb1272b ("mm, memcg: make scan aggression always exclude pr= otection") sz =3D max(e, c); r .*=3D (1 - (e+epsilon) ./ (sz+epsilon)); % uncomment to debug prints % e, c, r % nothing to reclaim, reached equilibrium if max(r) < epsilon break; endif % SWAP_CLUSTER_MAX r =3D max(r, (r > epsilon) .* cluster); % XXX here I do parallel reclaim of all siblings % in reality reclaim is serialized and each sibling recalculates own resi= dual c =3D max(c - r, 0); ch =3D [ch ; c]; eh =3D [eh ; e]; rh =3D [rh ; r]; endfor t c, e Signed-off-by: Michal Koutn=C3=BD --- .../selftests/cgroup/test_memcontrol.c | 20 +++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testi= ng/selftests/cgroup/test_memcontrol.c index eba252fa64ac..9ffacf024bbd 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -260,9 +260,9 @@ static int cg_test_proc_killed(const char *cgroup) * memory pressure in it. * * A/B memory.current ~=3D 50M - * A/B/C memory.current ~=3D 33M - * A/B/D memory.current ~=3D 17M - * A/B/F memory.current ~=3D 0 + * A/B/C memory.current ~=3D 29M + * A/B/D memory.current ~=3D 21M + * A/B/E memory.current ~=3D 0 * * After that it tries to allocate more than there is * unprotected memory in A available, and checks @@ -365,10 +365,10 @@ static int test_memcg_min(const char *root) for (i =3D 0; i < ARRAY_SIZE(children); i++) c[i] =3D cg_read_long(children[i], "memory.current"); =20 - if (!values_close(c[0], MB(33), 10)) + if (!values_close(c[0], MB(29), 10)) goto cleanup; =20 - if (!values_close(c[1], MB(17), 10)) + if (!values_close(c[1], MB(21), 10)) goto cleanup; =20 if (c[3] !=3D 0) @@ -417,9 +417,9 @@ static int test_memcg_min(const char *root) * * Then it checks actual memory usages and expects that: * A/B memory.current ~=3D 50M - * A/B/ memory.current ~=3D 33M - * A/B/D memory.current ~=3D 17M - * A/B/F memory.current ~=3D 0 + * A/B/ memory.current ~=3D 29M + * A/B/D memory.current ~=3D 21M + * A/B/E memory.current ~=3D 0 * * After that it tries to allocate more than there is * unprotected memory in A available, @@ -512,10 +512,10 @@ static int test_memcg_low(const char *root) for (i =3D 0; i < ARRAY_SIZE(children); i++) c[i] =3D cg_read_long(children[i], "memory.current"); =20 - if (!values_close(c[0], MB(33), 10)) + if (!values_close(c[0], MB(29), 10)) goto cleanup; =20 - if (!values_close(c[1], MB(17), 10)) + if (!values_close(c[1], MB(21), 10)) goto cleanup; =20 if (c[3] !=3D 0) --=20 2.35.3 From nobody Thu May 7 20:50:12 2026 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 23210C433FE for ; Wed, 18 May 2022 15:41:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239635AbiERPlP (ORCPT ); Wed, 18 May 2022 11:41:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239489AbiERPkx (ORCPT ); Wed, 18 May 2022 11:40:53 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7649F2F3A8; Wed, 18 May 2022 08:40:49 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id EDF811F8D9; 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Wed, 18 May 2022 15:40:47 +0000 From: =?UTF-8?q?Michal=20Koutn=C3=BD?= To: cgroups@vger.kernel.org, linux-mm@kvack.org Cc: Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Richard Palethorpe Subject: [PATCH 4/4] selftests: memcg: Remove protection from top level memcg Date: Wed, 18 May 2022 17:40:37 +0200 Message-Id: <20220518154037.18819-5-mkoutny@suse.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220518154037.18819-1-mkoutny@suse.com> References: <20220518154037.18819-1-mkoutny@suse.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The reclaim is triggered by memory limit in a subtree, therefore the testcase does not need configured protection against external reclaim. Also, correct/deduplicate respective comments Signed-off-by: Michal Koutn=C3=BD --- tools/testing/selftests/cgroup/test_memcontrol.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testi= ng/selftests/cgroup/test_memcontrol.c index 9ffacf024bbd..9d370aafd799 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -247,7 +247,7 @@ static int cg_test_proc_killed(const char *cgroup) =20 /* * First, this test creates the following hierarchy: - * A memory.min =3D 50M, memory.max =3D 200M + * A memory.min =3D 0, memory.max =3D 200M * A/B memory.min =3D 50M, memory.current =3D 50M * A/B/C memory.min =3D 75M, memory.current =3D 50M * A/B/D memory.min =3D 25M, memory.current =3D 50M @@ -257,7 +257,7 @@ static int cg_test_proc_killed(const char *cgroup) * Usages are pagecache, but the test keeps a running * process in every leaf cgroup. * Then it creates A/G and creates a significant - * memory pressure in it. + * memory pressure in A. * * A/B memory.current ~=3D 50M * A/B/C memory.current ~=3D 29M @@ -335,8 +335,6 @@ static int test_memcg_min(const char *root) (void *)(long)fd); } =20 - if (cg_write(parent[0], "memory.min", "50M")) - goto cleanup; if (cg_write(parent[1], "memory.min", "50M")) goto cleanup; if (cg_write(children[0], "memory.min", "75M")) @@ -404,8 +402,8 @@ static int test_memcg_min(const char *root) =20 /* * First, this test creates the following hierarchy: - * A memory.low =3D 50M, memory.max =3D 200M - * A/B memory.low =3D 50M, memory.current =3D 50M + * A memory.low =3D 0, memory.max =3D 200M + * A/B memory.low =3D 50M, memory.current =3D ... * A/B/C memory.low =3D 75M, memory.current =3D 50M * A/B/D memory.low =3D 25M, memory.current =3D 50M * A/B/E memory.low =3D 0, memory.current =3D 50M @@ -490,8 +488,6 @@ static int test_memcg_low(const char *root) goto cleanup; } =20 - if (cg_write(parent[0], "memory.low", "50M")) - goto cleanup; if (cg_write(parent[1], "memory.low", "50M")) goto cleanup; if (cg_write(children[0], "memory.low", "75M")) --=20 2.35.3