Syslinux - Aug 2014 - testing out 6.03 network booting... (6.03-pre19)

On 08/11/2014 06:12 AM, Shantanu Gadgil wrote:
> Hi all,
> 
> I too am getting positive results using 6.03-pre19 lpxelinux.0, for the
problem that I have been facing.
> 
> The symptom was that booting hangs on client side.
> On the server (DNSMasq TFTP) it keeps getting a request for the same (MAC
address) file.
> OR, alternatively it just stops completely.
> 
> My server: OptiPlex 755. BIOS A22
> The PXE booting client: OptiPlex 960. BIOS A17
> 
> * Things are broken using 6.03-pre17 lpxelinux.0 and working correctly
using 6.03-pre19 lpxelinux.0
> 
Wonderful.  It looks like we really hit some paydirt here.

	-hpa

--------------------------------------------
On Mon, 8/11/14, H. Peter Anvin <hpa at zytor.com> wrote:

 Subject: Re: [syslinux] testing out 6.03 network booting... (6.03-pre19)
 To: "Shantanu Gadgil" <shantanugadgil at yahoo.com>,
"syslinux at zytor.com" <syslinux at zytor.com>
 Date: Monday, August 11, 2014, 10:21 PM
 
 On 08/11/2014 06:12 AM,
 Shantanu Gadgil wrote:
...
...
  > * Things are broken using 6.03-pre17
 lpxelinux.0 and working correctly using 6.03-pre19
 lpxelinux.0
 > 
 
 Wonderful.? It looks like we really hit some
 paydirt here.
 
 ??
We are not ready for "prime-time" though.
Using the "lpxelinux.0" file from 6.03-pre19 ...

My RHEL5 installs, when  using the "http://" for kernel, initrd and
append lines, seem to be hitting some sort of parameter length limit.
The culprit seems to be the long "append" line.

The same append line, when NOT using "http://" work fine. (of course
the initrd and kernel lines don't have http://xxxxxxxxx) and so are shorter.

RHEL6 installs works fines with the long parameter lengths, http or otherwise.

* I'll try to shorten the WEB url for RHEL5 and see if it goes through.

Regards,
Shantanu

>    
> We are not ready for "prime-time" though.
> Using the "lpxelinux.0" file from 6.03-pre19 ...
> 
> My RHEL5 installs, when  using the "http://" for kernel, initrd
and append lines, seem to be hitting some sort of parameter length limit.
> The culprit seems to be the long "append" line.
> 
> The same append line, when NOT using "http://" work fine. (of
course the initrd and kernel lines don't have http://xxxxxxxxx) and so are
shorter.
> 
> RHEL6 installs works fines with the long parameter lengths, http or
otherwise.
> 
> * I'll try to shorten the WEB url for RHEL5 and see if it goes through.
> 
How long is the parameter length?  Really old kernels had a
511-character limit (current kernels have a 2047-character limit), so it
might not be anything to do with Syslinux...

	-hpa