[ltt-dev] move marker-control file into debugfs

[guijianfeng@cn.fujitsu.com (Gui Jianfeng)]

Hi Mathieu,

Lai and I will be on vocation unitl 2/2, might be untouched.
It's chinese new year.
I'll post a patch to implement debugfs marker-control then.

Gui Jianfeng wrote:
> Mathieu Desnoyers wrote:
>> * Gui Jianfeng (guijianfeng at cn.fujitsu.com) wrote:
>>> Hi Mathieu,
>>>
>>> I'd like to move "/proc/ltt" into debugfs. How do
>>> you think of that? If you don't object, i'll post
>>> a patch later, and update ltt-arm and other relative
>>> tools.
>>>
>> Yes, this should be done. Please have a look at the discussion I had
>> with Zhaolei on this. It was on the ltt-dev ML.
>>
>> Basically, the idea is to change the semantics a bit. The following
>> directory tree would be great :
>>
>> /mnt/debugfs/ltt/markers/
>>                          <channel_names>/
>>                                          <marker_names>/
>>
>> And within each individual <marker_names>/ directory, we would have
>> those files :
>>
>> enabled (write, takes Y, y, 1 or N, n, 0. See ltt-trace-control.c.)
>>         (read, prints 1 or 0)
>>
>> We may want to remove the ability to connect markers to specific probes.
>> Markers would always be only connected to the default serializer.
>> Markers using ltt-type-serializer does not use the probe pointer anyway.
>>
>> We will probably want to let the
>> kernel/marker.c:add_marker()/remove_marker() code call into the debugfs
>> interface code to update the directory tree accordingly.
> 
>   Thanks for your comments, i'll see what i can do.
> 
>> Regards,
>>
>> Mathieu
>>
>>
>>> -- 
>>> Regards
>>> Gui Jianfeng
>>>
>>>
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>>>
> 

-- 
Regards
Gui Jianfeng