Re: Smatch check for Spectre stuff

From: Peter Zijlstra
Date: Mon Apr 23 2018 - 08:46:17 EST

On Mon, Apr 23, 2018 at 07:31:03AM -0500, Gustavo A. R. Silva wrote:
> Hi Peter,
> On 04/20/2018 07:00 AM, Peter Zijlstra wrote:
> >
> > Hi Dan,
> >
> > awesome stuff...
> >
> > So I fear that many are actually things we want to fix. Our policy was
> > to kill the speculation on the first load and not worry if it can be
> > completed with a dependent load/store.
> >
> I wonder if there is any thread where I can read the discussion about that
> policy that you mention.
> Could you share it here, please?

I think it was somewhere in the many spectre variant1 threads when Linus
Alexei and Dan W were hashing out the mitigation thing. I cannot quickly
find the specific email.

Clarifying that position was one reason for the patches I did, Linus and
Dan W are on Cc and I figure that if they all agree we should maybe add
a little something to Documentation/speculation.txt.