lkml.org 
[lkml]   [2018]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [RFC PATCH v6 01/26] Documentation/x86: Add CET description
From
Date
On Tue, 2018-11-20 at 10:52 +0100, Ingo Molnar wrote:
> * Yu-cheng Yu <yu-cheng.yu@intel.com> wrote:
>
> > +X86 Documentation
> > [...]
> > +
> > +At run time, /proc/cpuinfo shows the availability of SHSTK and IBT.
>
> What is the rough expected performance impact of CET on average function
> call frequency user applications and the kernel itself?

I don't have any conclusive numbers yet; but since currently only user-mode
protection is implemented, I suspect any impact would be most likely to the
application. The kernel would spend some small amount of time on the setup of
CET.

Yu-cheng

\
 
 \ /
  Last update: 2018-11-20 21:42    [W:0.551 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site