netdev - Re: [PATCH] net: sched: print jiffies when transmit queue time out

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Message-ID: <20230419182713.2cd1f81b@kernel.org>
Date:   Wed, 19 Apr 2023 18:27:13 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Yajun Deng <yajun.deng@...ux.dev>
Cc:     jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: sched: print jiffies when transmit queue time out

On Wed, 19 Apr 2023 19:56:32 +0800 Yajun Deng wrote:
> Although there is watchdog_timeo to let users know when the transmit queue
> begin stall, but dev_watchdog() is called with an interval. The jiffies
> will always be greater than watchdog_timeo.
> 
> To let users know the exact time the stall started, print jiffies when
> the transmit queue time out.

Please add an explanation of how this information is useful in practice.