From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.18]) (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 5E3C0374D1; Thu, 29 May 2025 05:00:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748494826; cv=none; b=YWsdCpsVahKOz5eowRDeQtPisrek2oM7PbpMBadgi6sjsF5qIaV7H5zGFLpFmlJA9/4YduGEu2hHh6wWL9jB7PHdl7J309zlSS6Vxj2F4DyciulVH4EeyD+EAfIotTFKs6dXvJgOjh2asGvJBJy9e+RWUZ1LlnNg0pSvAu5F93U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748494826; c=relaxed/simple; bh=Uj9KaTlKjZ04OwLsCy31/baS+zN3iU7xI+0xVMtauG4=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=blY3boxyVzq7wA0sB3vxiYKLUjcY9hZ4Bhzkd12Nj6mHQ5STX0+4CyLe+ILeCFYxdZZKNux6+2sufelJ4UUE0i8eU3gmZmM03AxgKUehbkcIsHS2vkfDi6hkDL2za74bwsY8iTQEsuvnQSbgVa8nozAVprGwy6CbiZMRuQb2ENQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=bwTaqbeH; arc=none smtp.client-ip=192.198.163.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="bwTaqbeH" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1748494825; x=1780030825; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Uj9KaTlKjZ04OwLsCy31/baS+zN3iU7xI+0xVMtauG4=; b=bwTaqbeHE7O0inZMQrsNMOvcMZxmN6D0VIhuAmLM/LkkLXMyeFreILqq jc6njbzTn0Gr2XXuTIFiYDHmetYDgF/F/2JSuMj0FpOS4M0DO2PMNQuYY nDUz0h9QeRwI5UUiip6dE2sbePr+dWzbekhhMNcuVNFDlRvIW4n2cASpr YRccChTND/Qk9xYEBKTKsMsUYc3zLkpTTD1Tpr+D5p4cQbHYdIer87MrO 8HkzKqDKxMNWvTYfcBBpyBvvBMQm8Wl8iIEzdiaOhV8CnoDRwyFu6ZlRL 62VN51LynEr8/MCu+Q1tvcsYNu5obtof4pHQEpQn0my9Q13w2GdsomKhI g==; X-CSE-ConnectionGUID: R5dJkOS7Rye9pGcrNI3RTQ== X-CSE-MsgGUID: KLdUBbklQFC6xmiEBj/lvQ== X-IronPort-AV: E=McAfee;i="6700,10204,11447"; a="49789212" X-IronPort-AV: E=Sophos;i="6.15,323,1739865600"; d="scan'208";a="49789212" Received: from fmviesa008.fm.intel.com ([10.60.135.148]) by fmvoesa112.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 May 2025 22:00:24 -0700 X-CSE-ConnectionGUID: 6Yc4bf51SwCaqGHQMXw8dg== X-CSE-MsgGUID: JbXJOqJWTOyPuhklUBvESA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,323,1739865600"; d="scan'208";a="143778407" Received: from chenyu-dev.sh.intel.com ([10.239.62.107]) by fmviesa008.fm.intel.com with ESMTP; 28 May 2025 22:00:19 -0700 From: Chen Yu To: peterz@infradead.org, akpm@linux-foundation.org, mkoutny@suse.com, shakeel.butt@linux.dev Cc: mingo@redhat.com, tj@kernel.org, hannes@cmpxchg.org, corbet@lwn.net, mgorman@suse.de, mhocko@kernel.org, muchun.song@linux.dev, roman.gushchin@linux.dev, tim.c.chen@intel.com, aubrey.li@intel.com, libo.chen@oracle.com, kprateek.nayak@amd.com, vineethr@linux.ibm.com, venkat88@linux.ibm.com, ayushjai@amd.com, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, yu.chen.surf@foxmail.com, Chen Yu Subject: [PATCH v6 0/2] sched/numa: add statistics of numa balance task migration Date: Thu, 29 May 2025 12:53:36 +0800 Message-Id: X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Introducing the task migration and swap statistics in the following places: /sys/fs/cgroup/{GROUP}/memory.stat /proc/{PID}/sched /proc/vmstat These statistics facilitate a rapid evaluation of the performance and resource utilization of the target workload. Patch 1 is a fix from Libo to avoid task swapping for kernel threads and user thread that does not have mm, because Numa balance only cares about the user pages via VMA. Patch 2 is the major change to expose the statistics of task migration and swapping in corresponding files. The reason to fold patch 1 and patch 2 into 1 patch set is that patch 1 is necessary for patch 2 to avoid accessing a NULL mm_struct from a kernel thread, which causes NULL pointer exception. Changes since v5: Enhance the git commit message to describe the reason why these events are introduced in memory.stat/vmstat rather than cpu.stat. Previous version: v5: https://lore.kernel.org/all/cover.1748002400.git.yu.c.chen@intel.com/ v4: https://lore.kernel.org/all/cover.1746611892.git.yu.c.chen@intel.com/ v3: https://lore.kernel.org/lkml/20250430103623.3349842-1-yu.c.chen@intel.com/ v2: https://lore.kernel.org/lkml/20250408101444.192519-1-yu.c.chen@intel.com/ v1: https://lore.kernel.org/lkml/20250402010611.3204674-1-yu.c.chen@intel.com/ Chen Yu (1): sched/numa: add statistics of numa balance task Libo Chen (1): sched/numa: fix task swap by skipping kernel threads Documentation/admin-guide/cgroup-v2.rst | 6 ++++++ include/linux/sched.h | 4 ++++ include/linux/vm_event_item.h | 2 ++ kernel/sched/core.c | 9 +++++++-- kernel/sched/debug.c | 4 ++++ kernel/sched/fair.c | 3 ++- mm/memcontrol.c | 2 ++ mm/vmstat.c | 2 ++ 8 files changed, 29 insertions(+), 3 deletions(-) -- 2.25.1