Subject: Re: Shouldn't we compile kernels at least without StrongARM optimizations?
To: None <Richard.Earnshaw@arm.com>
From: Ignatios Souvatzis <email@example.com>
Date: 01/24/2003 12:17:30
Content-Type: text/plain; charset=us-ascii
On Fri, Jan 24, 2003 at 10:59:36AM +0000, Richard Earnshaw wrote:
> > Hi,
> > as all of you know, StrongARM optimized 1.6 compiled kernels tend to ra=
> > hangs.
> Well I wasn't aware of that (though I'm running current rather than 1.6).=
> 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=
> > until the compiler is fixed?
> 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=
> 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=
hidden? Yes, I think this is possible.
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