linux-kernel - Re: [PATCH] perf list: Skip the invalid hybrid pmu

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Date:   Wed, 7 Jul 2021 15:24:23 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH] perf list: Skip the invalid hybrid pmu

Hi Jiri,

On 7/7/2021 3:58 AM, Jiri Olsa wrote:
>> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
>> index 88c8ecdc60b0..281670e9c4bd 100644
>> --- a/tools/perf/util/pmu.c
>> +++ b/tools/perf/util/pmu.c
>> @@ -1604,6 +1604,9 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
>>   	pmu = NULL;
>>   	j = 0;
>>   	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
>> +		if (perf_pmu__is_invalid_hybrid(pmu->name))
>> +			continue;
> hum why not detect it in pmu_lookup early on
> and not add that pmu at all?
> 
> thanks,
> jirka
> 

Yes, it's a good idea that detects it in pmu_lookup, thanks!

Thanks
Jin Yao