[ltt-dev] ioctl and tracing over nfs

[Gorka Gorka]

Dear LTTng users,

I'm trying to trace my development board (mini2440,FriendlyARM based on Samsung S3C2440 processor) but i can't get the lttd daemon to start. I'm using the 2.6.29-rc7 kernel.

I followed the LTTng website's instructions but the start command (lttctl -C -w /tmp/trace1 trace1) didn't succeeded.

I tried to start manually the lttd daemon with this command : lttd -t /tmp/trace2 -c /mnt/debugfs/ltt/ -a -N 1 -v but after directories creation i get this error :

....
Appending to file /tmp/trace2/markers/syscall_state/sys_call_table/enable as requested
Channel file : /mnt/debugfs/ltt//destroy_trace
Opening file.
Appending to file /tmp/trace2/destroy_trace as requested
Channel file : /mnt/debugfs/ltt//setup_trace
Opening file.
Appending to file /tmp/trace2/setup_trace as requested
Channel file : /mnt/debugfs/ltt//control
Entering channel subdirectory...
Creating trace subdirectory /tmp/trace2/control
Adding inotify for channel /mnt/debugfs/ltt//control/
Added inotify for channel /mnt/debugfs/ltt//control/, wd 174
Error in getting the number of subbuffers: Inappropriate ioctl for device

The filesystem is mounted over NFS protocol, could it be the reason of this error ? 

Regards,

Kagior



 
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