ACK: [SRU][N:linux][PATCH 0/1] x86: tsc: Fix TSC clock source being disabled when SNC is enabled causing fall back to less precise HPET

Tim Whisonant tim.whisonant at canonical.com
Sat Jan 10 01:06:15 UTC 2026


On Fri, Jan 09, 2026 at 05:16:16PM +0100, Thibault Ferrante wrote:
> BugLink: https://bugs.launchpad.net/bugs/2138120
> 
> [ Impact ]
> 
>  * Performance degradation can occur after the first power cycle due to using the less precise HPET instead of TSC.
> 
> [ Fix ]
> 
>  * Clean cherry pick of :
>   b4bac27 x86/tsc: Use topology_max_packages() to get package number
> 
> [ Test Plan ]
> 
>  * Compiled
> 
> [ Where problems could occur ]
> 
>  * TSC regression.
> 
> [ Other Info ]
>  
>  * This is a public version of: https://bugs.launchpad.net/bugs/2115101
> 
> Feng Tang (1):
>   x86/tsc: Use topology_max_packages() to get package number
> 
>  arch/x86/kernel/tsc.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> -- 
> 2.51.0
> 

Acked-by: Tim Whisonant <tim.whisonant at canonical.com>



More information about the kernel-team mailing list