[U-Boot-Users] multicast tftp: RFC2090

[David Updegraff <dave@cray.com>]

Jerry

IMHO.. its a no-brainer: it costs almost nothing, adds _very_ litte
code, incurs no penatly for FTP servers that dont support it or that
have no other concurrent downloaders... but has a _H_U_G_E_ impact where
its usefull.

I.e. to my view, RCF7090 should be _the_ tftp protocol.  All upside, no
downside that I see.  Aside -- of course! -- from the bugs we have not
yet found in that patch. -;)


> David Updegraff wrote:
>> Ok; here my mulicast TFTP patch.  Have had the opportunity to test with
>> both the RTL8139 and TSEC ethernet drivers, with up to a dozen clients
>> concurrent.
>>
>> In a way I'm tempted to simply remove the #if CONFIG_RFC7090 clutter as
>> it is benign if you happen to be talking to a non-multicast tftp server;
>> and would make things rather more readable.  But too timid...
>>
>> -dbu.
> 
> Hi Dave,
> 
> Interesting, not as much change needed as I would have guessed.
> 
> Now I'm dying of curiosity... what is your impression of the usefulness
> of RFC7090?  It always struck me as a lab curiosity: in fairly
> artificial cases where a bunch of CPU boards are powered up
> simultaneously...
> * a room full of machines with a master breaker
> * a rack of CPUs
> it would be a big win, but that is a fairly unusual setup in the areas I
> hang out in.
> 
> On the other hand, we have a customer that currently has up to 4 units
> in a rack, and in the future possibly more units in a rack, that could
> possibly benefit from RFC2090.
> 
> Best regards,
> gvb