Re: [patch 20/24] x86/speculation: Split out TIF update

[Jiri Kosina]

On Tue, 27 Nov 2018, Thomas Gleixner wrote:

> > Does it really have to? 
> > 
> > We need this special handling only if the next task has TIF_SPEC_UPDATE 
> > set, which is one-off event globally (when seccomp marks all its threads 
> > so due to seccomp filter change), and once all the TIF_SPEC_UPDATE tasks 
> > schedule at least once, we're in a consistent state again and don't need 
> > this, as every running task will then have its TIF consistent with MSR 
> > value.
> 
> And how so? You set the bits is spec_flags. And then you set the TIF_UPDATE
> bit which is evaluated once.

Yeah, that was a complete brainfart on my side, sorry for the noise, 
disregard that crap. I blame it all on the dentist appointment I went 
through before writing the patch :p

Thanks,

-- 
Jiri Kosina
SUSE Labs