conf/73834: Bad dependencies for /etc/rc.d/savecore

Yar Tikhiy yar at comp.chem.msu.su
Wed Feb 15 03:57:58 PST 2006


On Mon, Feb 13, 2006 at 07:30:08PM +0000, Doug Barton wrote:
> 
> First, it turns out that you can actually recover a dump
> even after the partition has been swapon'ed. Second, the
> problem you describe here has been discussed at great
> length on the freebsd-current mailing list. The short
> version is that there is a chicken and egg problem. In
> order to capture the dump, you need a file system to write
> to. In order to get a file system to write to, you need
> fsck. In order to allow fsck to run on a memory constrained
> system, you may need swap. Thus, the current thinking is
> that the status quo is the best of our current options.

IMHO it's worth to note in addition that one can always
arrange a separate dump-only partition if dumps to swap get
overwritten due to heavy paging activity during early boot
stages, such as fsck of a large file system in small RAM.

-- 
Yar


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