linux-kernel - Re: 6.9.0-rc2+ kernel hangs on boot (bisected, maybe LED related)

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Date: Mon, 15 Apr 2024 13:37:54 -0700
From: Ben Greear <greearb@...delatech.com>
To: Lee Jones <lee@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, linux-leds@...r.kernel.org,
 Johannes Berg <johannes@...solutions.net>
Subject: Re: 6.9.0-rc2+ kernel hangs on boot (bisected, maybe LED related)

On 4/11/24 00:07, Lee Jones wrote:
> On Wed, 03 Apr 2024, Ben Greear wrote:
> 
>> On 4/2/24 10:38, Ben Greear wrote:
>>> On 4/2/24 09:37, Ben Greear wrote:
>>>> Hello,
>>>>
>>>> Sometime between rc1 and today's rc2, my system quit booting.
>>>> I'm not seeing any splats, it just stops.  Evidently before
>>>> sysrq is enabled.
>>>>
>>>> [  OK  ] Started Flush Journal to Persistent Storage.
>>>> [  OK  ] Started udev Coldplug all Devices.
>>>>            Starting udev Wait for Complete Device Initialization...
>>>> [  OK  ] Listening on Load/Save RF …itch Status /dev/rfkill Watch.
>>>> [  OK  ] Created slice system-lvm2\x2dpvscan.slice.
>>>>            Starting LVM2 PV scan on device 8:19...
>>>>            Starting LVM2 PV scan on device 8:3...
>>>> [  OK  ] Started Device-mapper event daemon.
>>>> iwlwifi 0000:04:00.0: WRT: Invalid buffer destination: 0
>>>> sysrq: This sysrq operation is disabled.
>>>>
>>>> I can start a bisect, but in case anyone knows the answer already, please let me know.
>>>>
>>>> Thanks,
>>>> Ben
>>>>
>>>
>>> So, deadlock I guess....
> 
> Does this help you in any way?
> 
> https://lore.kernel.org/all/bbcdbc1b-44bc-4cf8-86ef-6e6af2b009c3@gmail.com/
> 
Hello Lee,

I cannot see how that patch above would fix my issues since I am not using that driver,
but possibly some similar change needs to be made to iwlwifi.

Johannes, you had another suggestion: changing iwlwifi's request_module() to request_module_nowait() in
iwl_req_fw_callback()

Is that still best thing to try in your opinion?

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com