Re: [PATCH v2 0/6] x86/alternatives: text_poke() fixes

[Peter Zijlstra]

On Thu, Sep 06, 2018 at 11:09:23AM -0700, Andy Lutomirski wrote:
> > On Sep 6, 2018, at 10:58 AM, Nadav Amit <namit@xxxxxxxxxx> wrote:
> > It depends what security you want. Some may consider even the short
> > time-window in which the kernel code is writable from other cores as
> > insufficient for security.
> > 
> > In addition, the set removes the need for remote TLB shootdowns that
> > text_poke() - with this fix - requires.
> > 
> 
> Iâm personally in favor of not needing a global broadcast flush to install kprobes.

That's fine. But at that point its an optimization, not a correctness
issue.