Re: Slow (higher scheduling latency?) system after S3 - regression 4.17 -> 4.19 ?

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On Thu, Apr 02, 2026 at 03:02:15PM +0200, Marek Marczykowski-Górecki wrote:
> On Fri, Mar 27, 2026 at 01:47:55PM +0100, Marek Marczykowski-Górecki wrote:
> > Some further observation, this time regarding timers:
> 
> In the meantime Roger suggested it might be about C-states. So, I just
> tried booting with max_cstate=0. I got this:

We had a design session on this issue, and managed to find (thanks Roger!)
that adding:

    tsc_mode='always_emulate'

to the domU config fixes the issue. Now, the question is how to fix it
properly...

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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