linux-kernel - Re: [PATCH V10 net-next 01/10] net: hibmcge: Add pci table supported in this module

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Message-ID: <20240915171044.72aed6cd@kernel.org>
Date: Sun, 15 Sep 2024 17:10:44 +0200
From: Jakub Kicinski <kuba@...nel.org>
To: Jijie Shao <shaojijie@...wei.com>
Cc: <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>,
 <shenjian15@...wei.com>, <wangpeiyang1@...wei.com>,
 <liuyonglong@...wei.com>, <chenhao418@...wei.com>,
 <sudongming1@...wei.com>, <xujunsheng@...wei.com>,
 <shiyongbang@...wei.com>, <libaihan@...wei.com>, <andrew@...n.ch>,
 <jdamato@...tly.com>, <horms@...nel.org>,
 <kalesh-anakkur.purayil@...adcom.com>, <jonathan.cameron@...wei.com>,
 <shameerali.kolothum.thodi@...wei.com>, <salil.mehta@...wei.com>,
 <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V10 net-next 01/10] net: hibmcge: Add pci table
 supported in this module

On Thu, 12 Sep 2024 10:51:18 +0800 Jijie Shao wrote:
> +	netdev->tstats = devm_netdev_alloc_pcpu_stats(&pdev->dev,
> +						      struct pcpu_sw_netstats);
> +	if (!netdev->tstats)
> +		return -ENOMEM;
> +	netdev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;

take a look at how pcpu_stat_type is used in net/core/dev.c
core will automatically allocate the stats for you and handle them in
the ndo for reading stats
your current code repeats what core already does so it will leak the
memory and I think double count