Re: something's wrong

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

Tried - the screen stays as it was, no movement whatsoever. No network
activity, the keyboard is also dead - does not respond to CtrlAltEsc,
even the lights are off and CapsLock/NumLock does not trigger
anything.

Weird. I guess next thing is to try ddb through the serial console.

Chavdar

On 5 November 2013 00:33, Chavdar Ivanov <ci4ic4%gmail.com@localhost> wrote:
> I've got similar behaviour on my 6.99.25 amd64 box - complete freeze
> during building of Firefox 25 - easily repeatable. The system was
> stable until 6.99.24, something happened later. Unmodified GENERIC
> kernel, I couldn't break and get a dump, only hard reset brings it
> back. I'll try the blind trigger suggestion tomorrow.
>
> On the other hand, my build box (XEN3_DOMU under XenServer) gets
> updated at the same time as the above box and continues to work as
> before.
>
> Chavdar
>
> On 2 November 2013 14:43, Mindaugas Rasiukevicius 
> <rmind%netbsd.org@localhost> wrote:
>> Thomas Klausner <wiz%NetBSD.org@localhost> wrote:
>>> <...>
>>>
>>> Please note that the machine doesn't panic -- otherwise I'd have seen
>>> reboots instead.
>>>
>>> I'm regularly updating, so I think this problem is rather new (last
>>> month or so). I was usually running with clang; using libc++ is new,
>>> no idea if this is related or not (I guess not).
>>>
>>> Does anyone have any ideas about this?
>>
>> Just a few..
>>
>> Can you get into DDB during a lockup (blindly triggering it and typing
>> call ddb_vgapost)?  If you can, inspecting the LWPs (with ps/l) to see
>> what are they doing would be useful.
>>
>> During the glitches, you can try to inspect the LWPs using crash(8).
>> Also, it would be useful to monitor vmstat -e counters, perhaps some
>> interrupt rates increase to unusual levels.  When glitches start to
>> happen, you might try to run constant snapshots of lockstat sleep 15,
>> perhaps some lock contention would indicate what is going on.
>>
>>>
>>> Thanks,
>>>  Thomas
>>
>> --
>> Mindaugas
>
>
>
> --
> ----



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