On Thu, Mar 31, 2005 at 12:43:38PM -0800, Roland Dreier wrote:
> > The task I'm suggesting was therefore:
> > - remove the -fno-unit-at-a-time in arch/i386/Makefile in your private
> > kernel sources
> > - use gcc 3.4
> > - reduce the stack usages in call paths > 3kB
>
> This is a good idea. However, I might suggest using gcc 4.0 (you'll
> have to use a snapshot now, but the release should only be a few weeks
> away). A patch went into gcc 4.0 that makes gcc more intelligent
> about sharing stack for variables that cannot be alive at the same
> time, and therefore it may be more feasible to make unit-at-a-time
> work for the i386 kernels.
That's one option.
Jörn, can you send a list of call paths with a stack usage > 3kB when
compiling with gcc 3.4 and unit-at-a-time (or tell me how to generate
these lists)?
If fixing a handful of places was sufficient, it was IMHO worth it for
enabling unit-at-a-time with gcc 3.4 .
> - R.
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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