Re: misc/38425 (savecore confused if getbootfile(3) fails)

[Simon Burge <simonb%NetBSD.org@localhost>]

YAMAMOTO Takashi wrote:

> > On Sun, Jun 14, 2009 at 06:50:17AM -0700, Tom Spindler wrote:
> >> I don't know about any of you, but savecore completely fails to work
> >> for me after 1.78 savecore.c; in particular, failing to set the
> >> booted kernel causes check_space to die a painful death:
> > 
> > I'll poke at it some more.  This works in our local tree -- maybe I
> > missed a change when integrating it back into NetBSD.
> > 
> > It is absolutely, positively *not* the right solution to cause any
> > of these utilities to try to know the kernel name.  Any operation
> > they have any business doing can be done via /dev/ksyms -- the
> > question is where I missed one or more references to the kernel name
> > that were exposed beyond libkvm, which correctly defaults to use
> > /dev/ksyms if some other kernel name is not rammed down its throat.
> 
> talking about the right solution, savecore should not use /dev/ksyms
> or info from the live kernel at all.  we should store necessary info
> in the dump itself.  (as freebsd does?)

I had thought that /dev/ksyms seemed right, but that obviously doesn't
help if the kernel that left the core wasn't the currently running
kernel (as Yamaoto aludes to).

Cheers,
Simon.