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Date:      Tue, 30 Nov 2021 13:35:39 +0100
From:      Hans Petter Selasky <hps@selasky.org>
To:        Andrew Turner <andrew@fubar.geek.nz>, freebsd-arm@freebsd.org
Subject:   Re: 14-CURRENT Kernel Panic due to USB hub?
Message-ID:  <45534c79-311b-d1df-c412-5bd782678cfb@selasky.org>
In-Reply-To: <B1DFC16D-47F6-4803-BF12-406EC96465B9@fubar.geek.nz>
References:  <fbfa2dcc-ae3f-230b-2f56-3b940b025342@morante.net> <2b555ef9-12fe-6214-79a0-cebce1933771@selasky.org> <5bfb1865-8033-0da6-27e4-3c25fb067cee@morante.net> <6F2AD5E1-5AB1-4D08-97F4-84E2905D592B@fubar.geek.nz> <B1DFC16D-47F6-4803-BF12-406EC96465B9@fubar.geek.nz>

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On 11/30/21 13:22, Andrew Turner wrote:
> I bisected the detached messages back to 601ee53858f6 [1]. If I revert this change I no longer see this on the console.
> 
> I am also unable to reproduce the panic with this change reverted. As the panic can be difficult to reproduce I am unsure if reverting this change is enough to fix it, or if it’s just making it less likely to be triggered.
> 
> Andrew
> 
> [1] https://cgit.freebsd.org/src/commit/?id=601ee53858f6

Hi,

Could you verify that you are not running out of kernel stack?

May this be due to some code in the .text segment which is not properly 
aligned?

If you compile and load USB as modules, does the panic go away?

--HPS




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