[lkml]   [2019]   [Jul]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC v2 00/27] Kernel Address Space Isolation
On Fri, Jul 12, 2019 at 02:17:20PM +0200, Alexandre Chartre wrote:
> On 7/12/19 1:44 PM, Peter Zijlstra wrote:

> > AFAIK3 this wants/needs to be combined with core-scheduling to be
> > useful, but not a single mention of that is anywhere.
> No. This is actually an alternative to core-scheduling. Eventually, ASI
> will kick all sibling hyperthreads when exiting isolation and it needs to
> run with the full kernel page-table (note that's currently not in these
> patches).
> So ASI can be seen as an optimization to disabling hyperthreading: instead
> of just disabling hyperthreading you run with ASI, and when ASI can't preserve
> isolation you will basically run with a single thread.

You can't do that without much of the scheduler changes present in the
core-scheduling patches.

 \ /
  Last update: 2019-07-12 14:38    [W:0.047 / U:9.876 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site