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Date: Thu, 03 Apr 2008 15:31:59 +0100
From: Vince Hoffman <jhary@unsane.co.uk>
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To: Norberto Meijome <freebsd@meijome.net>
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Cc: Volker <volker@vwsoft.com>, freebsd-stable@freebsd.org
Subject: Re: Q&A on textdumps (fwd)
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Norberto Meijome wrote:
> On Wed, 02 Apr 2008 21:51:52 +0200
> Volker <volker@vwsoft.com> wrote:
> 
>> while the system is experiencing a panic, it does not have any knowledge
>> about filesystems and also does not know about the GELI swap space anymore.
>>
>> In this situation the geli encrypted swap will be overwritten by a dump
>> (either minidump or the classical one). When the system boots up again,
>> it will check $dumpdev for a dump and save it to $savecore before geli
>> swap is brought up again.
>>
>> Or in short: geli backed swap should not do you any harm.
> 
> Hi Volker,
> That is what I had thought. But I clearly remember, back in 6.x the dump would be written to swap, then on restart, geli would kick in before savedump , therefore obliterating anything saved from the previous session.
> 
> I will need to retest this...luckily 7-STABLE has been rock solid and haven't experienced many crashes.
> 
> btw, how do I trigger a panic manually? :D
> 
sysctl debug.kdb.panic=1
according to
http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-online-ddb.html
anyway :)


Vince


> cheers,
> B
> 
> _________________________
> {Beto|Norberto|Numard} Meijome
> 
> "A fanatic is one who can't change his mind and won't change the subject."
>    Sir Winston Churchill
> 
> I speak for myself, not my employer. Contents may be hot. Slippery when wet. Reading disclaimers makes you go blind. Writing them is worse. You have been Warned.
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