Re: 15s wait for prompt for sudo su - on -current

From: Allan Jude <allanjude_at_freebsd.org>
Date: Sun, 13 Jun 2021 16:48:11 UTC 
On 6/13/2021 12:10 PM, tech-lists wrote:
> On Sun, Jun 13, 2021 at 04:35:18PM +0100, Graham Perrin wrote:
>> On 13/06/2021 15:21, tech-lists wrote:
>>> Hi,
>>>
>>> context is main-n247177-dab84426a68
>>
>> <https://cgit.freebsd.org/src/log/?qt=range&q=dab84426a68&h=main>
>>
>>> # uname -KU
>>> 1400018 1400018
>>> # uname -mn
>>> rpi4 arm64
>>>
>>> disk is usb3-connected spinning rust. OS is on microsd
>>>
>>> I'm seeing, recently, a roughly 15s wait for the prompt to return after
>>> sudo su -
>>>
>>> sudo is aliased to doas
>>>
>>> The problem does not happen on stable/13-n245218-41d864457dd
>>
>> <https://cgit.freebsd.org/src/log/?qt=range&q=41d864457dd&h=stable%2F13>
>> finds nothing, can you double-check that reference?
> 
> Hi,
> 
> % git -C /usr/src --no-pager log -1 --format=%cd origin/stable/13
> Wed Jun 9 12:51:50 2021 +0200
> 
> % git -C /usr/src rev-list --first-parent --count stable/13
> 245219
> 
> % uname -v
> FreeBSD 13.0-STABLE #0 stable/13-n245218-41d864457dd: Mon May 24
> 03:46:32 BST 2021
> 
> do you need me to check anything else?
> 
> thanks,

During the 15 seconds of waiting, press control+t a bunch of times, what
is the waitchan?

-- 
Allan Jude