Re: [PATCH -tip 31/32] sched: Add a coresched command line option

2020-11-25 Thread Balbir Singh
On Wed, Nov 25, 2020 at 02:45:37PM +0100, Peter Zijlstra wrote: > On Tue, Nov 17, 2020 at 06:20:01PM -0500, Joel Fernandes (Google) wrote: > > Some hardware such as certain AMD variants don't have cross-HT MDS/L1TF > > issues. Detect this and don't enable core scheduling as it can > > needlessly

Re: [PATCH -tip 31/32] sched: Add a coresched command line option

2020-11-25 Thread Peter Zijlstra
On Tue, Nov 17, 2020 at 06:20:01PM -0500, Joel Fernandes (Google) wrote: > Some hardware such as certain AMD variants don't have cross-HT MDS/L1TF > issues. Detect this and don't enable core scheduling as it can > needlessly slow those device down. > > However, some users may want core scheduling

Re: [PATCH -tip 31/32] sched: Add a coresched command line option

2020-11-19 Thread Randy Dunlap
Hi Joel, On 11/17/20 3:20 PM, Joel Fernandes (Google) wrote: > diff --git a/Documentation/admin-guide/kernel-parameters.txt > b/Documentation/admin-guide/kernel-parameters.txt > index b185c6ed4aba..9cd2cf7c18d4 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++

[PATCH -tip 31/32] sched: Add a coresched command line option

2020-11-17 Thread Joel Fernandes (Google)
Some hardware such as certain AMD variants don't have cross-HT MDS/L1TF issues. Detect this and don't enable core scheduling as it can needlessly slow those device down. However, some users may want core scheduling even if the hardware is secure. To support them, add a coresched= option which