From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-170.mta1.migadu.com (out-170.mta1.migadu.com [95.215.58.170]) (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 C6864155C82 for ; Fri, 8 May 2026 01:54:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778205275; cv=none; b=os5CATuAU2RprRXJFmavfa/GdSC+SKydCJ7ZS48u3Eh+LadbR3rlWYBhMeLVROQbDyNypva7bSj4ZhZLuynKhxYqTAv/hi96S1bVr+hg6fyEzq6wLYYUlb+DoNRmcDYXbO9xPy1lsraKjIYedDJS2RiIQvW6xROSAaejixEVUlc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778205275; c=relaxed/simple; bh=/YZbwZpWJU1waamggRUeumztcFHazNDc3x7M/Ltw75A=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=ZEhEczOBwbZipc7xYPsY2zEUME0q4zTX8AefnQyWqJ0uEQT0J6+hh+jC/LwuPZhzVtoeS+JYS4ZSppI+O8OxE565BDDPY813kh9acXA+GqytESD13rokgCoDl9CY8q4wyDQmr5G/UVXkmPL61pxngIio7MYwgKjCJPyuZZjiAUQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=gB5wWFR8; arc=none smtp.client-ip=95.215.58.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="gB5wWFR8" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1778205262; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=nseJDaSxTNqf6W2FqkALGVnCq/m8td61Q2PPLEqM7Zc=; b=gB5wWFR8d2fS6CPEk685eZA7JwGi9erehPEoqkVzp0el5erKaewWqfl6AD8KiWU9D8HS// pukirYz/z+LC5LSbu6Ep31VUgJUuhISwzvJa5QpVySDArvRBeN9E9c7J0Ddgl5bj/kn0uB XuvRSPHbWISeDrHw4Xsmv1wjCeMyZmA= From: Hao Ge To: Andrew Morton , David Hildenbrand Cc: linux-mm@kvack.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org, Hao Ge Subject: [PATCH] mm/balloon: expose per-node balloon pages in node meminfo Date: Fri, 8 May 2026 09:53:16 +0800 Message-Id: <20260508015316.25722-1-hao.ge@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Commit 835de37603ef ("meminfo: add a per node counter for balloon drivers") added NR_BALLOON_PAGES and exposed it in /proc/meminfo. However, the per-node view at /sys/devices/system/node/nodeX/meminfo was not updated, even though the counter is already tracked per-node. Add it to node_read_meminfo() so users can see balloon usage per NUMA node without having to parse the raw vmstat file. Signed-off-by: Hao Ge --- drivers/base/node.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/base/node.c b/drivers/base/node.c index d7647d077b66..53f4e51d6d82 100644 --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -513,6 +513,7 @@ static ssize_t node_read_meminfo(struct device *dev, "Node %d Slab: %8lu kB\n" "Node %d SReclaimable: %8lu kB\n" "Node %d SUnreclaim: %8lu kB\n" + "Node %d Balloon: %8lu kB\n" #ifdef CONFIG_TRANSPARENT_HUGEPAGE "Node %d AnonHugePages: %8lu kB\n" "Node %d ShmemHugePages: %8lu kB\n" @@ -543,7 +544,8 @@ static ssize_t node_read_meminfo(struct device *dev, node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)), nid, K(sreclaimable + sunreclaimable), nid, K(sreclaimable), - nid, K(sunreclaimable) + nid, K(sunreclaimable), + nid, K(node_page_state(pgdat, NR_BALLOON_PAGES)) #ifdef CONFIG_TRANSPARENT_HUGEPAGE , nid, K(node_page_state(pgdat, NR_ANON_THPS)), -- 2.25.1