netdev - Re: [PATCH net v2] net/sched: act

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Message-ID: <20230424143651.53137be4@kernel.org>
Date:   Mon, 24 Apr 2023 14:36:51 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        Leon Romanovsky <leon@...nel.org>,
        Victor Nogueira <victor@...atatu.com>, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, netdev@...r.kernel.org,
        xiyou.wangcong@...il.com, jiri@...nulli.us, kernel@...atatu.com
Subject: Re: [PATCH net v2] net/sched: act_mirred: Add carrier check

On Mon, 24 Apr 2023 13:59:15 -0400 Jamal Hadi Salim wrote:
> > Then fix the driver. It shouldn't hang.
> > Other drivers just drop packets if link is down.  
> 
> We didnt do extensive testing of drivers but consider this a safeguard
> against buggy driver (its a huge process upgrading drivers in some
> environments). It may even make sense to move this to dev_queue_xmit()
> i.e the arguement is: why is the core sending a packet to hardware
> that has link down to begin with? BTW, I believe the bridge behaves
> this way ...

I'm with Stephen, even if the check makes sense in general we should
first drill down into the real bug, and squash it.
-- 
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