Description of problem:
The kernel-devel RPM package takes forever to install
because the postinstall scriptlet contains this line:
/usr/bin/find . -type f | while read f; do hardlink -c /usr/src/kernels/*FC*/$f
$f ; done
It could be improved by using xargs.
This is an IO bound operation, so I'm very doubtful it'll be faster.
The only thing that will speed this up notably is to not have as many kernels
installed at the same time.