svn commit: r314948 - in head: lib/libstand sys/boot/i386/libi386

[Rodney W. Grimes]

> On 28/05/2017 01:09, Kamil Czekirda wrote:
> > In initial revision I noticed, that I'm not sure it should be default behavior.
> > In a lot of installations pxeloader can base on the cache and doesn't require
> > second, full request with the same answer. In that situation we can switch off
> > bootp() and I think it would be nice to have this switch and give them to users.
> > Flag during compilation is sensible.
> > 
> > In very simple and popular case we have chain with four requests for the same
> > information (!):
> > PXE (NIC) -> iPXE -> pxeloader -> dhclient
> > and it's possible to switch off request from iPXE and pxeloader without breaking
> > boot process.
> 
> Well, the information given to PXE/NIC and iPXE is not exactly the same as
> bootfile must differ.  Also, a nit: as far as I know, it's currently impossible
> to run dhclient on a network booted _diskless_ system.

I dont think that is actually true.  Infact dont we need to run
dhclient on a diskless client if we intend to keep our dhcp lease beyond the
initial issue time period, ie renewal ever X minutes?

> So, yeah, in some setups we can shave off a request from pxeboot and it probably
> makes sense to have that option.
> 
> -- 
> Andriy Gapon
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-- 
Rod Grimes                                                 rgrimes at freebsd.org