[rfc] replacing /boot/kernel.old with a unique directory name

[Alexander Best]

On Sat Aug 13 11, Garrett Cooper wrote:
> On Aug 13, 2011, at 12:51 PM, Alexander Best <arundel at freebsd.org> wrote:
> 
> > hi there,
> > 
> > i just had the following idea: how about instead of copying the current kernel
> > to /boot/kernel.old and then installing the new one under /boot/kernel as the
> > results of target installkernel, we create a unique directory name for the old
> > kernel?
> > 
> > something like /boot/kernel-r${revision}-${/dev/random}?
> > 
> > that would let people not only boot the previous kernel, but all kernels that
> > have been replaced by target installkernel. this would make tracking issues,
> > which have been introduced by a certain commit much easier, imho.
> > 
> > i don't think implementing this logic would be that difficult. the only problem
> > i see is with ${/dev/random} in the case where people are running a kernel
> > without /dev/{u}random support.
> 
> Why not just use INSTKERNNAME?

hmm...won't setting INSTKERNNAME set the path to where the new kernel will be
installed and not where the current kernel will be backup'ed?

> -Garrett