Subject: Re: savecore_flags="-z"
To: der Mouse <mouse@Rodents.Montreal.QC.CA>
From: Charles M. Hannum <email@example.com>
Date: 12/02/1999 12:42:38
der Mouse <mouse@Rodents.Montreal.QC.CA> writes:
> > Or perhaps someone could implement the Digital Unix hack of only
> > saving pages used by the kernel -- which would generally result in a
> > much smaller dump.
> It could also lose crucial information, because what you'd really be
> saving is pages the kernel thinks are in use, and its idea may be wrong
> for any of many reasons - indeed, perhaps that's the very bug that
> caused the crash.
That might seem like a good argument, but in fact virtually no bugs
(*none* that I know of) encountered in the last 3-4 years are of that
nature. And it would be easier to have a knob to change the behavior.
Note that such a hack is also fairly critical for getting *any* useful
information from a system with a large amount of memory. Disks may be
getting faster, but dumping 4GB still takes quite a while.