Date: Tue, 18 May 1999 07:34:55 +0800 From: Peter Wemm <peter@netplex.com.au> To: Luoqi Chen <luoqi@watermarkgroup.com> Cc: cvs-all@FreeBSD.org, cvs-committers@FreeBSD.org Subject: Re: cvs commit: src/sbin/savecore savecore.c Message-ID: <19990517233500.CC6AB1F72@spinner.netplex.com.au> In-Reply-To: Your message of "Mon, 17 May 1999 12:47:52 -0400." <199905171647.MAA19874@lor.watermarkgroup.com>
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Luoqi Chen wrote:
> > Luoqi Chen wrote:
> > > luoqi 1999/05/12 21:29:13 PDT
> > >
> > > Modified files:
> > > sbin/savecore savecore.c
> > > Log:
> > > Read dumpdev using sysctl(3) interface. Now savecore should work again
> > > after the dev_t changes.
> >
> > I looked at this before and was tempted to do the same, but there is a
> > problem.. Using the sysctl() requires that the kernel that crashed is the
> > current running kernel.
[..]
> savecore *always* gets dumpdev (and some other variables) from the live kerne
l,
> this makes sense because the value of dumpdev (in .data section of kernel) wi
ll
> be overwritten after a reboot.
I realized this a while ago and nearly posted a self correction.
IMHO, What savecore should be doing is:
- savecore: usage: savecore [-cfvz] [-N system] directory
+ savecore: usage: savecore [-cfvz] [-M dumpdev] [-N system] directory
or something like that. That way you can do a savecore from a specific
device or before dumpon.
> -lq
Cheers,
-Peter
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