Re: sparc sun4c support - time to drop it?

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On Sat, May 05, 2012 at 06:21:04PM +0200, Sam Ravnborg wrote:
> Is anyone having any sun4c boxes alive and running Linux?
> 
> I have a nice box myself that does not boot - I do not know why.
> But we are talking abot slow and old stuff here.
> 
> Is it time to drop support for sun4c - or is anyone still
> having an interest keeping that platform alive?
> 
> Looking into recent history of the kernel only one person
> (Mark - copied) seems to have contributed
> solely for the purpose of getting a sun4c box working.
> 
> 
> Sunstuff has a list of boxes based on sun4c here:
> http://sunstuff.org/hardware/systems/sun4/sun4c/
> 
> SPARCstation 1, SLC, IPC, 1+, 2, ELC, IPX
> SPARCengine 1

To summarize this thread...

There are unsuprisingly some that for sentimental
reasons would like to keep sun4c support in-kernel.

But sun4c is outdated and if anyone want to run something
on a sun4c box the *BSD variants has better performance.

Also considering that sun4c support has been broken for
some time and there is a few changes pending where sun4c
does not make things simpler we will drop sun4c support.

I already took a quick look at it and in the process
I think I uncovered a bug in NMI handling for sun4m
in UP mode. We would call the sun4c nmi trap despite
being a sun4m box - this would not go well.

When I have something tested I will forward my
patches.

	Sam
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