[syslinux] Very slow download with pxelinux > 4.07 on specific hardware

[Eric PEYREMORTE]

Le 11/03/2014 00:56, Gene Cumm a écrit :
> On Mon, Mar 10, 2014 at 7:55 PM, Gene Cumm <gene.cumm at gmail.com> wrote:
>> On Mon, Mar 10, 2014 at 7:15 PM, Gene Cumm <gene.cumm at gmail.com> wrote:
>>> On Mon, Mar 10, 2014 at 6:52 PM, Schlomo Schapiro <schlomo at schapiro.org> wrote:
>>>> Hi,
>>>>
>>>> On 10 March 2014 18:13, Eric PEYREMORTE <eric.peyremorte at iut-valence.fr>wrote:
>>>>
>>>>> Ok i give up. I will stick with the old version version (4.07) which works
>>>>> well with dell 380 and 790.
>>>>>
>>>>> I tried to understand what happened between 4.07 and 5 but i don't have
>>>>> the skill to understand low level c.
>>>>>
>>>>> Seems that the memory management changed a lot, maybe the culprit. But as
>>>>> many other things changed this is not obvious...
>>>>>
>>>> sad to say, we have exactly the same problem. With HTTP downloads it is
>>>> much worse, we could not find a stable and reliable version after 4.x.
>>>> Sadly nobody wanted to fix our syslinux problem, even as paid development.
>>>>
>>>> I very much hope that the syslinux project will overcome these obstacles.
>>>> It would be sad to see all the new development stay unused because if this.
>>> It's also a balance of time.  While working on 4.10-pre*/5.10-pre*, I
>>> found that some hardware misreports its behavior.  "Sure, Interrupts
>>> work" but they don't is but one that I worked around on specific
>>> hardware.
>>>
>>> --
>>> -Gene
>> Simple test (and boot failure is an option as long as the core's
>> messages are intact).  Could both of you try fetching
>> Syslinux-4.10-pre22 (zip versus tar is your choice), extract out
>> core/pxelinux.0 and boot with it then record the 4-digit value for
>> flags (in the "UNDI: baseio" line) and the first 3 octets (6 hex
>> digits including 0s) of the MAC address and take a reasonable screen
>> shot (I find a cell phone against a solid object to be pretty decent
>> when angled to reduce glare and distanced for proper focus) but don't
>> bother sending the picture yet.  It's possible that the workaround I
>> utilized can either be having a negative impact or needs to be
>> extended to more hardware.
>>
>> Attached you'll find an image with the two pieces highlighted.
>>
>> --
>> -Gene

First, 4.10-pre22 works as well as 4.07 on my dell optiplex 380. It is 
slow as hell from v5 to 6.03.
I also tried to put a 3com NIC inside, and the result was the same. But 
when i put the nic in an optiplex
740 it boots fine.

CLIENT MAC ADDR: B8 AC 6F
UNDI : baseio 0000 int 11 MTU 1500 type 1 "DIX+802.3" flags 0x1c1b

Ps : sorry for the capture quality i had to make a movie and extract a 
picture cause it was booting too fast.

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