From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (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 3041120CCED; Wed, 7 May 2025 11:22:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746616934; cv=none; b=eQuzosE1kYszZHY26HlaTn0GBusAlvX1USr5Wigt0OJVc387rvbH7z+I/2w/yZfkVrgNX4oRKTYDraKjUrbl5FXIqceO7yNW2T+bk0RvYqZ25i1XVwR2/HDvdbD95OgzT8aahkb6BGkupNTYfYp100fB9SaSsKFC6LzxPAhxzCk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746616934; c=relaxed/simple; bh=keSFJ17byZIacrkA9Q+V/bwj92nFNZoHf+fY/qM0Me0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=YMQmt56Gm7vT9W0R/oVAOgcHOwbTRXID2W6LNyG0jGjykrAFIFB9MNuWqhG9m7PnttlCo0qSOglXeZgqEQLixDIj7ntDnIQy7SWz/CgXNPqUmAMG8CE46EX0PXB7Y+WxM2XuF42lwq0u3t0L8da6/nbpfjhuTCpLsSZXAwbypGs= 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=k7lU0qj1; arc=none smtp.client-ip=198.175.65.14 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="k7lU0qj1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1746616933; x=1778152933; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=keSFJ17byZIacrkA9Q+V/bwj92nFNZoHf+fY/qM0Me0=; b=k7lU0qj1/I3oO66APas+JruigaBfXaP5LVobdSZZtamaVKXmupfTCydy uOni5hshBq1jUl3ns4keypNrDNbTeVgU7K/OMfRPk6NAxqy+0/Xjn6Xht LV3QF8OJ0Of6fkvq2rezfHWKAPyHPDiEd/of/uyARxfI/8ySYR5Jr1wo1 A+vTPF1zem6rfE5Mirz94Qmy/OCLahuafqUF2UXAantSEpncSpyxb0MT5 Arad9QDo7w/3s95+eEQJ/Xp3BWchZRd6MP/L5ir0b7FN+Z/QZJDF+yB5f E14FE/dHGy1ereMPZHo5SKjR6XakmWpC8qs8lw0lHqcrJSZie/SqtU3DU A==; X-CSE-ConnectionGUID: YluFXpkeQaqp/1aiWmMK3Q== X-CSE-MsgGUID: uR24XAleQvWsIy7A1njhNg== X-IronPort-AV: E=McAfee;i="6700,10204,11425"; a="52155806" X-IronPort-AV: E=Sophos;i="6.15,269,1739865600"; d="scan'208";a="52155806" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 May 2025 04:22:11 -0700 X-CSE-ConnectionGUID: jFtpUtg3R3G77mWFegnbEA== X-CSE-MsgGUID: tJLTWUbyT1SwHxuf0Oe82Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,269,1739865600"; d="scan'208";a="166974025" Received: from chenyu-dev.sh.intel.com ([10.239.62.107]) by fmviesa001.fm.intel.com with ESMTP; 07 May 2025 04:22:06 -0700 From: Chen Yu To: Peter Zijlstra , Andrew Morton Cc: mkoutny@suse.com, Ingo Molnar , Tejun Heo , Johannes Weiner , Jonathan Corbet , Mel Gorman , Michal Hocko , Muchun Song , Roman Gushchin , Shakeel Butt , "Chen, Tim C" , Aubrey Li , Libo Chen , K Prateek Nayak , Madadi Vineeth Reddy , Venkat Rao Bagalkote , "Jain, Ayush" , cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Chen Yu , Chen Yu Subject: [PATCH v4 0/2] sched/numa: add statistics of numa balance task migration Date: Wed, 7 May 2025 19:14:53 +0800 Message-Id: X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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, 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. The Tested-by and Acked-by tags are preserved, because these tags are provided in version 1 which has the p->mm check. Previous version: 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 migration 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