but Bill has beaten me on this. ;-)
However, he missed the part to compute the kernelsize in kilobytes,
so the minfree consideration was now overcautious. (I've also
changed the return type of dump_size() to void since int was useless.)
Being here, the fact that `vmcore' was written world-readable was just
a plain security hole: everybody who was able to crash a kernel could
later read any confidential information out of it at his will. Create
it with umask 077 instead.