Re: (2nd resent) [PATCH] [2.4.20-rc2] Promise Config.in/Configure.help

Brian Davids (dlister@yossman.net)
Sat, 16 Nov 2002 12:58:58 -0500

Marc-Christian Petersen wrote:
> Hi Marcello,
>
> attached patches updates Config.in and Configure.help entries
> for Promise PDC20XXX series.
>
> Source code looks to me that it also supports PDC20270,
> PDC20275 and PDC20276.
>
> I have such a PDC20270 and a friend has a PDC20276 working.
>
> Alan has ACKed this too.
>
> Please apply.
>
> ciao, Marc
.
.
.
> + Promise Ultra100 or PDC20265/PDC20267/PDC20268/PDC20269/PDC20270
> + Promise Ultra133 or PDC20275/PDC20276

I don't know about the PDC20270, but the 20269 I have is most definitely
an Ultra133TX2

Brian Davids

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 on top of the network driver to reduce the risk of getting
> hit by a breakpoint that is in the way of the gdb I/O. The code is
> almost too trivial to mention, but for anyone interested, it can still
> be found at:
>
> http://www.cs.arizona.edu/scout/software.html
>
> The relevant files are scout/sys/ai/kgdb_net.c and
> scout/router/tulip/tulip.c (the latter contains the Ethernet driver
> portion).

And I'm 95% sure that someone here (MontaVista) has done the same thing
for Linux... ARM if my memory serves me correctly. You'll also notice
that UDP debugging support is now in FSF GDB 5.3 snapshots. Sure, it's
a little lossy, but it works in the useful cases.

I'm not quite sure what happened to the kernel side... but it sounds
like this could be a nice candidate for the network dumping stack, too.

> PS: IIRC, the kgdb protocol has a simple checksumming protocol so it
> can deal with packet losses (perhaps not very gracefully, but on a
> LAN it's not going to be a problem anyhow).

Yes. The protocol also has explicit ACKs and has the basis for
retransmission; it's not extensive but it's enough to get by over even
a lossy serial cable.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer
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