Re: [patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-12-10 Thread Pavel Machek
Hi! > Documentation/admin-guide/kernel-parameters.txt | 56 ++ > Documentation/userspace-api/spec_ctrl.rst |9 Could we name this speculation.rst instead? _ is inconsistent, and spec could be shorthand for other stuff, too...

Re: [patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-29 Thread Tim Chen
On 11/28/2018 06:24 AM, Thomas Gleixner wrote: > > I've integrated the latest review feedback and the change which plugs the > TIF async update issue and pushed all of it out to: > >git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/pti > > For the stable 4.14.y and 4.19.y

Re: [patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-29 Thread Tim Chen
On 11/28/2018 06:24 AM, Thomas Gleixner wrote: > > I've integrated the latest review feedback and the change which plugs the > TIF async update issue and pushed all of it out to: > >git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/pti > > For the stable 4.14.y and 4.19.y

Re: [patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-28 Thread Thomas Gleixner
On Sun, 25 Nov 2018, Thomas Gleixner wrote: > Thats hopefully the final version of this. Changes since V1: > > - Renamed the command line option and related code to spectre_v2_user= as > suggested by Josh. > > - Thought more about the back to back optimization and finally left the >

Re: [patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-28 Thread Thomas Gleixner
On Sun, 25 Nov 2018, Thomas Gleixner wrote: > Thats hopefully the final version of this. Changes since V1: > > - Renamed the command line option and related code to spectre_v2_user= as > suggested by Josh. > > - Thought more about the back to back optimization and finally left the >

Re: [patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-26 Thread Ingo Molnar
* Thomas Gleixner wrote: > Thats hopefully the final version of this. Changes since V1: > > - Renamed the command line option and related code to spectre_v2_user= as > suggested by Josh. > > - Thought more about the back to back optimization and finally left the > IBPB code in

Re: [patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-26 Thread Ingo Molnar
* Thomas Gleixner wrote: > Thats hopefully the final version of this. Changes since V1: > > - Renamed the command line option and related code to spectre_v2_user= as > suggested by Josh. > > - Thought more about the back to back optimization and finally left the > IBPB code in

[patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-25 Thread Thomas Gleixner
Thats hopefully the final version of this. Changes since V1: - Renamed the command line option and related code to spectre_v2_user= as suggested by Josh. - Thought more about the back to back optimization and finally left the IBPB code in switch_mm(). It still removes the ptrace

[patch V2 00/28] x86/speculation: Remedy the STIBP/IBPB overhead

2018-11-25 Thread Thomas Gleixner
Thats hopefully the final version of this. Changes since V1: - Renamed the command line option and related code to spectre_v2_user= as suggested by Josh. - Thought more about the back to back optimization and finally left the IBPB code in switch_mm(). It still removes the ptrace