netdev - Re: [PATCH net-next 1/4] bnxt_en: Change FW message timeout warning

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Message-ID: <CACKFLin0j2+JWMWoHBAhzQDLmequ-fK4TOO+9hdfm92CoOyZ6A@mail.gmail.com>
Date: Wed, 16 Apr 2025 15:07:44 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com, 
	pabeni@...hat.com, andrew+netdev@...n.ch, pavan.chebbi@...adcom.com, 
	andrew.gospodarek@...adcom.com, 
	Kalesh AP <kalesh-anakkur.purayil@...adcom.com>
Subject: Re: [PATCH net-next 1/4] bnxt_en: Change FW message timeout warning

On Wed, Apr 16, 2025 at 2:44 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Wed, 16 Apr 2025 14:41:10 -0700 Michael Chan wrote:
> > On Tue, Apr 15, 2025 at 8:14 PM Jakub Kicinski <kuba@...nel.org> wrote:
> >
> > > sysctl_hung_task_timeout_secs is an exported symbol, and it defaults to 120.
> > > Should you not use it in the warning (assuming I understand the intent
> > > there)?
> > Yes, we have considered that.  This is only printed once at driver
> > load time, but the sysctl value can be changed at any time after the
> > driver is loaded.  So we just want to use a reasonable value well
> > below the default sysctl_hung_task_timeout_secs value as the
> > threshold.
> >
> > But we can reference and compare with the
> > sysctl_hung_task_timeout_secs value if that makes more sense.
>
> I see your point.  We could also check against
> CONFIG_DEFAULT_HUNG_TASK_TIMEOUT ?
>
> I noticed that some arches set this value really low (10 or 20 sec),
> it may be worth warning the users in such cases.

OK, that sounds good.  I will check CONFIG_DEFAULT_HUNG_TASK_TIMEOUT
in v2.  Thanks.

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