[syslinux] Problem with 90MB Initrd

[H. Peter Anvin]

We can, and do, suspend a TFTP transfer simply by delaying the ACK packet as necessary.

On September 29, 2015 7:45:27 PM PDT, Patrick Masotta <masottaus at yahoo.com> wrote:
>>>>
>On 09/26/2015 10:36 AM, Patrick Masotta via Syslinux wrote:
>> 
>> About PXEbc Peter has recently said:
>>> The problem with the pxebc is that it only supports one concurrent
>TFTP
>>> connection, and Syslinux expects to be able to keep multiple files
>open
>>> at the same time.
>>> http://www.syslinux.org/archives/2015-August/024025.html
>> 
>> I wonder why should syslinux.efi ever need to TFTP transfer more than
>one file simultaneously?
>> 
>
>Consider the case of INCLUDEd configuration files, for example.
>
>
>    -hpa<<<
>I do not understand.Are we parsing a configuration file and potentially
>starting new TFTP transfers while downloading it? How can we do this on
>a single thread?We cannot stop/resume a TFTP transfer then I cannot
>imagine how to detect an INCLUDE during TFTP transfer N to launch TFTP
>transfer N+1 if TFTP transfer N is not finished yet, all in a single
>thread and with none of the TFTP transfers timing out.
>
>I might be wrong but I think syslinux TFTP transfers are "atomic" (they
>transfer the whole configuration file) later the parsing action on the
>received file defines if other/s TFTP+parsing actions are required in
>case the INCLUDE command was previously found. If this is correct then
>there is never more than one TFTP file transfer at any given time (and
>we could use PXEbc).
>Please let me know if I'm wrong. Thanks.
>
>Best,Patrick

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