[ltt-dev] TODO list before releasing LTTng-buffering to LKML]

[zhaolei@cn.fujitsu.com (Zhaolei)]

>> - switch ltt-control.ko (currently over netlink) to debugfs
>> - switch marker list (and marker activation (currently in /proc/ltt) to debugfs
>>   Marker directory. One file per marker.
>> - Create a ltt-ascii.ko kernel module which merge-sorts the buffers and exports
>>   them to userspace through a debugfs file.
>>
> 
> Hi, Mathieu,
> 
> We are interested with the above TODOs, and we are planning to implement them.
> 
Hi Mathieu,

I finished a simple ltt-control.ko based on debugfs.

With this module, we can control ltt by following command now:
Start trace1 channel:
echo "0 trace1" > /sys/kernel/debug/ltt_control/control
Stop trace1 channel:
echo "1 trace1" > /sys/kernel/debug/ltt_control/control
Create trace1 channel:
echo "2 trace1 relay 0 0 0 0 0 0 0" > /sys/kernel/debug/ltt_control/control
Destroy trace1 channel:
echo "3 trace1" > /sys/kernel/debug/ltt_control/control

I tested it on i386 linux 2.6.27 with lttng.

User-mode lttctl also needs some modification to support this kind of control,
but at first, I'd like to hear some advice on this module.

Thanks!
Zhaolei
> Thanks, Lai
> 

>> If some of you are interested to work on any of these, you are welcome.
>> I'll be glad to post more details about these items upon request.
>>
>> Mathieu
>>
> 
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