Re: panic in daprobedone: Unholding 4 with cnt = 0

From: Warner Losh <imp_at_bsdimp.com>
Date: Sat, 17 Feb 2018 08:15:39 -0700
On Sat, Feb 17, 2018 at 8:04 AM, Hans Petter Selasky <hps_at_selasky.org>
wrote:

> On 02/17/18 15:47, Warner Losh wrote:
>
>> That's interesting. What did you do to get there? There's some code path
>> that's unholding the periph without first holding it. I've been trying to
>> find a scenario.
>>
>>
> I just booted into single user mode with a multi-card USB reader attached.
> Seems like some kind of race. Doesn't happen during normal boot.


I've done that with my systems here...

If you can reliably reproduce it, booting a kernel with 'options
DA_TRACK_REFS=2' in the kernel config and send me the output?

Warner
Received on Sat Feb 17 2018 - 14:15:41 UTC

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