Re: [PATCH v2 4/4] perf/x86/intel/pt: Opportunistically use single range output mode

[Alexander Shishkin]

Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> writes:

> diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c
> index 2f20d5a333c1..6edd7b785861 100644
> --- a/arch/x86/events/intel/pt.c
> +++ b/arch/x86/events/intel/pt.c
> @@ -491,7 +491,9 @@ static void pt_config(struct perf_event *event)
>  	}
>  
>  	reg = pt_config_filters(event);
> -	reg |= RTIT_CTL_TOPA | RTIT_CTL_TRACEEN;
> +	reg |= RTIT_CTL_TRACEEN;
> +	if (!buf->single)
> +		reg |= RTIT_CTL_TOPA;

This one is broken. The below is better.