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Date:      Thu, 30 Mar 2017 20:14:23 +0300
From:      Andrey Chernov <ache@freebsd.org>
To:        Bruce Evans <brde@optusnet.com.au>
Cc:        "Ngie Cooper (yaneurabeya)" <yaneurabeya@gmail.com>, avg@FreeBSD.org, bde@FreeBSD.org, current@FreeBSD.org
Subject:   Re: New syscons bugs: shutdown -r doesn't execute rc.d sequence and others
Message-ID:  <e1830cff-58af-f0b1-bab9-935ba32883f4@freebsd.org>
In-Reply-To: <20170331015718.X3330@besplex.bde.org>
References:  <7d5bbbf0-6908-185c-2ee0-29e0a4f60591@freebsd.org> <D9EAB41D-CE19-4225-8868-F4AFE461F903@gmail.com> <5587c798-d36c-9074-1060-30e206db5571@freebsd.org> <69af07a7-ec8f-9b7f-8b93-9ba148f30fec@freebsd.org> <8C24D1BA-1607-4C19-BA38-39256E82C7AF@gmail.com> <51045bee-a626-efb3-4b1e-0c3d36abb1ab@freebsd.org> <20170329132927.U882@besplex.bde.org> <f35b6ae1-c668-0649-e327-f57811b1d71a@freebsd.org> <20170330150449.R1061@besplex.bde.org> <3534bbeb-9f73-4e37-8f89-c05dd9f89f8c@freebsd.org> <20170330183716.W1655@besplex.bde.org> <4085b441-74ee-796f-adc0-713dfc198b03@freebsd.org> <1772f54a-4268-577a-8e7f-abce929d39c8@freebsd.org> <e4b3dd02-6dd2-0723-eed1-a3fd0be5b651@freebsd.org> <20170331015718.X3330@besplex.bde.org>

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On 30.03.2017 18:13, Bruce Evans wrote:
> On Thu, 30 Mar 2017, Andrey Chernov wrote:
> 
>> On 30.03.2017 12:34, Andrey Chernov wrote:
>>> On 30.03.2017 12:23, Andrey Chernov wrote:
>>>> Yes, only for reboot/shutdown. The system does not do anythings wrong
>>>> even under high load. On reboot or hang those lines are never printed:
>>>>
>>>> kernel: Waiting (max 60 seconds) for system process `vnlru' to
>>>> stop...done
>>>> kernel: Waiting (max 60 seconds) for system process `bufdaemon' to
>>>> stop...done
>>>> kernel: Waiting (max 60 seconds) for system process `syncer' to stop...
>>>> kernel: Syncing disks, vnodes remaining...5 3 0 1 0 0 done
>>>> kernel: All buffers synced.
>>>> (it is from 10-stable sample, old -current samples are lost)
>>>>
>>>> Moreover, GELI swap deactivation lines are never printed too (I already
>>>> mention that I change swap to normal, but nothing is changed).
>>>
>>> I start to have raw guess that _any_ kernel printf in shutdown mode
>>> cause not printf but premature reboot.
>>
>> Finally I have good news and bad news with today's -current:
>>
>> 1) It seems your latest commit r316136 fix premature reboot issue.
> 
> Now I need to know how that helped.  Do you used a non-default mode?

Perhaps it isn't really helped, but just hide the problem, changing some
another race time parameters.
I use 80x30 text mode on all screens.

>> 2) I still can't enter KDB using Ctrl-Alt-ESC, while booting, after
>> booting, after login and while shutdown - nothing happens.
>> boot -d enters KDB normally, but the keyboard sequence handler is
>> broken, not boot -d.
> 
> Try "<newline>~b".  

What? It just prints \n, new csh prompt and ~b

> It is an old bug that Ctrl-Alt-ESC (and Ctrl-PrtScr)

Ctrl-PrtScr does nothing too.

> But I think the misconfiguration is the
> same for vt. 

No, Ctrl-Alt-ESC works for vt at every phase of the system lifecycle.

I use Russian keymap for syscons, but Ctrl, Alt, ESC of course are not
remapped. I surely remember it works for syscons long time ago.

Just to not forget it, I use PS/2 keyboard and have no vt* lines in the
kernel config.




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