Re: [PATCH V2 0/5] Several fixes for group flag and counters-snapshotting

[Peter Zijlstra]

On Thu, Apr 24, 2025 at 06:47:13AM -0700, kan.liang@xxxxxxxxxxxxxxx wrote:
> From: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
> 
> The patch series includes several fixes for the new Intel features.
> 
> The first 4 patches are to fix the group flag issue which impacts the
> branch counters, PEBS counters-snapshotting and ACR.
> The V1 can be found at
> https://lore.kernel.org/lkml/20250423221015.268949-1-kan.liang@xxxxxxxxxxxxxxx/
> 
> The last patch is to fix an issue of counters-snapshotting.
> The V1 can be found at
> https://lore.kernel.org/lkml/20250204210514.4089680-1-kan.liang@xxxxxxxxxxxxxxx/
> 
> Kan Liang (5):
>   perf/x86/intel: Only check the group flag for X86 leader
>   perf/x86/intel: Check the X86 leader for pebs_counter_event_group
>   perf/x86/intel: Check the X86 leader for ACR group
>   perf/x86: Optimize the is_x86_event
>   perf/x86/intel/ds: Fix counter backwards of non-precise events
>     counters-snapshotting

It didn't apply cleanly, but I stomped on it and pushed out new
perf/urgent and perf/core branches that contain these patches. Hopefully
I didn't mess it up ;-)