[syslinux] lpxelinux.0 issues with larger initrd.img files from RHEL >= 7.5 on UCS servers?

[Mathieu Chouquet-Stringer]

	Hi,

I tried more syslinux/pxelinux versions and I can report the following
while using pxelinux.0:
4.03 OK (server boots fine)
4.07 OK (server boots fine)
5.00 KO (server reboots)
5.01 KO (server reboots)
5.10 KO (server reboots)
6.0* KO (server reboots)

Next step is to try the debug.c32 stuff I guess...

On Thu, Jun 20, 2019 at 08:52:44PM +0200, Mathieu Chouquet-Stringer wrote:
> > Maybe a packet capture might reveal something about the network setup?
> > 
> > Maybe it is not the size of the initrd file but rather a time 
> > limitation (which gets triggered by a big-enough file)?
> 
> If it's a timing difference it's going to be tricky: I converted to http
> instead of tftp because the transmission time is a least an order of
> magnitude faster over http...
> 
> > ###
> > DEFAULT dbg
> > PROMPT 1
> > SAY First press [Enter] for debug.c32, then [1][Enter] for OS.
> > 
> > # Once in the boot prompt, press "Enter".
> > LABEL dbg
> > COM32 debug.c32
> > APPEND -e pxe_call,malloc
> > # Additional functions for debug might be of interest.
> > 
> > 
> > # After debug.c32 returns to the boot prompt,
> > # press "1" and "Enter".
> > LABEL 1
> > LINUX mykernel
> > INITRD mybiginitrd
> > APPEND myoptions
> > ###
> > 
> > 
> > Once the label named "1" is launched, is there any info (that could 
> > help)?
> > 
> > Please avoid using boot menus for these tests; use the boot prompt.
> 
> I'll give that a shot as well.
> 

-- 
Mathieu Chouquet-Stringer                               m+syslinux at thi.eu.com
            The sun itself sees not till heaven clears.
	             -- William Shakespeare --