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hi,

On Fri, Jan 24, 2003 at 10:59:36AM +0000, Richard Earnshaw wrote:
> > Hi,
> >=20
> > as all of you know, StrongARM optimized 1.6 compiled kernels tend to ra=
ndom
> > hangs.
> >=20
>=20
> Well I wasn't aware of that (though I'm running current rather than 1.6).=
 =20
> Where's the relevant PR?

When I mumbled on ICB about hangs, I immediately got the advice to compile
without strongarm optimization, that's why I assumed it was generally known.

I opened a PR: port-shark/20027

> > Shouldn't we compile kernels without archv4 and strongarm optimizations=
=20
> > until the compiler is fixed?
>=20
> How do you know it's the compiler?

I don't know. I was pointed to it. Alas, I don't remember anymore by whom.

> If it's a random behaviour, then my=20
> first suspicion would be that it's some sort of timing issue (or cache=20
> related).  Compiler errors generally lead to repeatable problems.  There=
=20
> was a lot of hacking on the pmap in the run up to 1.6, and it wouldn't=20
> surprise me in the least if that wasn't the cause of your problems.

So changing the optimization just changes timing in a way that the bug is=
=20
hidden? Yes, I think this is possible.

Regards,
	Ignatios

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