From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from szxga07-in.huawei.com (szxga07-in.huawei.com [45.249.212.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 81C70146D68; Tue, 27 Aug 2024 06:29:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.35 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724740143; cv=none; b=bellF7eQJ7nWiaEhH4AGWScBUqU9ZzON1m0dEWm6av6FNMuLZgu/ntYNTzghMA3ojCCHS+XPjVtlCo2s/ndTwfO7SWmW7/gWyk/f20FqRSHUJPkXzecU2ObYOhm+QXkpkj880KHCB1X3pEiL4HUNWRUHS+MSGNA0cueZF2RlTYQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724740143; c=relaxed/simple; bh=NqJqmcTcq+7y4he0nh5cqPcFccxFcRxwn+lMDOyvFdI=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=JipfSiHKTiDl0EOWtO3SzvGbgNH8lcNzPWG8enCwrMwfxtRxiP3sNuGZqsGM3R9o0hsv8+2chWaF4LGHQWkK/mHp7dCyB0f2izOGib+nXpdlZ6yBGDpEJdIHx9NBAy9KZQqeFz+ydL/YiGA3NGnSSQi2cIw3WXAXGXyMtrBeCIE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.35 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.214]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4WtHgM13ZTz1S77s; Tue, 27 Aug 2024 14:28:47 +0800 (CST) Received: from kwepemd100013.china.huawei.com (unknown [7.221.188.163]) by mail.maildlp.com (Postfix) with ESMTPS id 8237D1A016C; Tue, 27 Aug 2024 14:28:57 +0800 (CST) Received: from huawei.com (10.67.174.121) by kwepemd100013.china.huawei.com (7.221.188.163) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.34; Tue, 27 Aug 2024 14:28:56 +0800 From: Chen Ridong To: , , , , , , CC: , Subject: [PATCH v3 -next 00/12] cgroup:cpuset:separate legacy cgroup v1 code and put under config option Date: Tue, 27 Aug 2024 06:20:59 +0000 Message-ID: <20240827062111.580296-1-chenridong@huawei.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemd100013.china.huawei.com (7.221.188.163) Cgroups v2 have been around for a while and many users have fully adopted them, so they never use cgroups v1 features and functionality. Yet they have to "pay" for the cgroup v1 support anyway: 1) the kernel binary contains an unused cgroup v1 code, 2) some code paths have additional checks which are not needed, 3) some common structures like task_struct and mem_cgroup contain unused cgroup v1-specific members. Cgroup memory controller has already separated legacy code to memory-v1.c. So it is time to do the same thing for cpuset controller. This patchset aims to do: 1) moving cgroup v1-specific cpuset code to the new cpuset-v1.c file, 2) putting definitions shared by cpuset.c and cpuset-v1.c into the cpuset-internal.h header, 3) introducing the CONFIG_CPUSETS_V1 config option, turned off by default, 4) making cpuset-v1.c to compile only if CONFIG_CPUSETS_V1 is set. --- V3: - Delete blank line at the end of file. - Rename some generic functions name with cpuset_/cpuset1_ prefix. V2: - Update to base on the latest cgroup/for-6.12. - Add CONFIG_CPUSETS_V1 for cpuset_memory_pressure_bump. Chen Ridong (12): cgroup/cpuset: introduce cpuset-v1.c cgroup/cpuset: move common code to cpuset-internal.h cgroup/cpuset: move memory_pressure to cpuset-v1.c cgroup/cpuset: move relax_domain_level to cpuset-v1.c cgroup/cpuset: move memory_spread to cpuset-v1.c cgroup/cpuset: add callback_lock helper cgroup/cpuset: move legacy hotplug update to cpuset-v1.c cgroup/cpuset: move validate_change_legacy to cpuset-v1.c cgroup/cpuset: move v1 interfaces to cpuset-v1.c cgroup/cpuset: rename functions shared between v1 and v2 cgroup/cpuset: guard cpuset-v1 code under CONFIG_CPUSETS_V1 cgroup/cpuset: add sefltest for cpuset v1 MAINTAINERS | 3 + include/linux/cpuset.h | 4 + init/Kconfig | 13 + kernel/cgroup/Makefile | 1 + kernel/cgroup/cpuset-internal.h | 304 ++++++ kernel/cgroup/cpuset-v1.c | 562 +++++++++++ kernel/cgroup/cpuset.c | 908 +----------------- .../selftests/cgroup/test_cpuset_v1_base.sh | 77 ++ 8 files changed, 1013 insertions(+), 859 deletions(-) create mode 100644 kernel/cgroup/cpuset-internal.h create mode 100644 kernel/cgroup/cpuset-v1.c create mode 100755 tools/testing/selftests/cgroup/test_cpuset_v1_base.sh -- 2.34.1