> On Apr 14, 2017, at 13:02, Alan Somers <asom...@freebsd.org> wrote:

...

> Right: check_size() needs to know the on-disk size of the core dump.
> But it doesn't have any way to know the on-disk size until after it's
> written everything to disk.  That's why I simply disabled the check at
> $WORK.  Another possibility would be for savecore to ignore the
> up-front check, but handle ENOSPC by deleting the fragmentary vmcore
> file.  I never tried to implement that.

Let me dig through the gzip format a bit. There should be a reasonably good 
upper bound approximation that we can use for compressed minidumps.
Thanks!
-Ngie

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