Re: [Syllable-kernel] SMP: -O1 vs. -O2

[Daniel G. <da...@fp...>]

On Mon, 2004-10-18 at 05:03 +0100, Kristian Van Der Vliet wrote:

> Attached is the result of tonights work.  I've identified smp.c as the culprit 
> (Makes sense, at least)  I was working with the stock 0.5.4 source which did 
> not include your previous patches for -O2, so I've used -O3 and -O1, although 
> I will confirm tommorrow with -O1 and -O2 just to be 100% sure.

I'm not an asm guru, and the results of those two compiles are extremely
different.  Hardly surprising. :)  I did read over the source in smp.c,
and I didn't see anything that jumped out at me.

One obvious (temprorary) solution is to just build this file with -O1
rather than -O2 or -O3.  That would get smp working, and I don't think
the optimizations will make any difference in this case.

FWIW, the Linux kernel is built with -O2, and says not to use anything
higher.

Daniel