linux-kernel - Re: [PATCH v1 3/9] perf util: Reconstruct rblist for supporting per-thread shadow stats

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Message-ID: <ca393cc4-4c83-eb4c-f9ed-031f8d88713e@linux.intel.com>
Date:   Wed, 22 Nov 2017 09:29:26 +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 v1 3/9] perf util: Reconstruct rblist for supporting
 per-thread shadow stats



On 11/21/2017 11:17 PM, Jiri Olsa wrote:
> On Mon, Nov 20, 2017 at 10:43:38PM +0800, Jin Yao wrote:
> 
> SNIP
> 
>>   
>> +static void init_saved_rblist(struct rblist *rblist)
>> +{
>> +	rblist__init(rblist);
>> +	rblist->node_cmp = saved_value_cmp;
>> +	rblist->node_new = saved_value_new;
>> +	rblist->node_delete = saved_value_delete;
>> +}
>> +
>> +static void free_saved_rblist(struct rblist *rblist)
>> +{
>> +	rblist__reset(rblist);
>> +}
>> +
>> +void perf_stat__init_runtime_stat(struct runtime_stat *stat)
>> +{
>> +	memset(stat, 0, sizeof(struct runtime_stat));
> 
> what's this memset for? that struct has only rb_list
> 
> jirka
> 

Currently this struct has only rblist. I use memset to zero this struct 
is for future potential new added fields to this struct.

If it's not good, I will remove this memset.

Thanks
Jin Yao