netdev - Re: [PATCH net v3 1/1] net: phylink: Add module

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Message-ID: <ZZ+67poJKiNsVmKw@shell.armlinux.org.uk>
Date: Thu, 11 Jan 2024 09:54:54 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: "Gan, Yi Fang" <yi.fang.gan@...el.com>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Marek Behún <kabel@...nel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-stm32@...md-mailman.stormreply.com" <linux-stm32@...md-mailman.stormreply.com>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Looi, Hong Aun" <hong.aun.looi@...el.com>,
	"Voon, Weifeng" <weifeng.voon@...el.com>,
	"Song, Yoong Siang" <yoong.siang.song@...el.com>,
	"Choong, Yong Liang" <yong.liang.choong@...el.com>
Subject: Re: [PATCH net v3 1/1] net: phylink: Add module_exit()

On Thu, Jan 11, 2024 at 06:38:58AM +0000, Gan, Yi Fang wrote:
> Hi Andrew,
> 
> Regarding the justification on why it is safe to remove phylink, 
> we had done some memory leak check when unloading the phylink module.
>  
> root@...alhost:~# lsmod | grep "phylink"
> phylink               73728  0
> root@...alhost:~# rmmod phylink
> root@...alhost:~# echo scan > /sys/kernel/debug/kmemleak
> root@...alhost:~# cat /sys/kernel/debug/kmemleak
> root@...alhost:~#
>  
> So far, we didn't observe any memory leaking happened when unloading
> phylink module. Is it sufficient or do you have any other suggestions to check 
> on whether the module is safe to remove?

I have no idea why one would think that memory leaks are in some way
related to whether a module can be removed or not. To me at least they
are two separate issues.

I'll continue waiting for the justification...

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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