Re: pxeboot binary is too big on FreeBSD (>640KBytes)

Reply: Simon J. Gerraty: "Re: pxeboot binary is too big on FreeBSD (>640KBytes)"
In reply to: Hans Petter Selasky : "pxeboot binary is too big on FreeBSD (>640KBytes)"
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From: Toomas Soome <tsoome_at_me.com>
Date: Mon, 21 Feb 2022 15:19:58 UTC

> On 21. Feb 2022, at 09:43, Hans Petter Selasky <hps@selasky.org> wrote:
> 
> FYI:
> 
> After a lot of digging trying everything, I found that the pxeboot and loader.efi was too big simply due to ZFS support.
> 
> So I did this after buildworld:
> 
> cd /usr/src/stand
> make WITHOUT_LOADER_ZFS=YES clean
> make WITHOUT_LOADER_ZFS=YES all
> make WITHOUT_LOADER_ZFS=YES install
> 
> And now it works, with my old GigaByte mainboard!
> 
> Why should pxeboot have ZFS support?
> 
> https://forums.freebsd.org/threads/problem-with-isc-dhcpd-and-diskless-booting.82199/
> 
> —HPS
> 

Well, the feature X can be helpful for recovery purposes. The root cause is not the feature X itself, but the size limit. And the unfortunate fact, the size limit is not fixed, but depends on the system. Therefore there are two options - either to fix the size limit or drop option X from default build — at least till the size limit is fixed (or support for BIOS will be dropped).

rgds,
toomas