At Xen 3.0.2, try tbctl command (0 or 1) 
Tracing Buffer On and Off 
(tbctl is in xentrace.)
N.B.:This is obsolate command in current change set
Thanks,
Atsushi SAKAI
>Until recently in the -unstable tree, setsize would return weird error
>messages even if it did what it was supposed to do. Look at the
>console i/o and see if it says that tracing has been enabled, and try
>using xentrace. If xentrace works, just ignore the error messages.
>Presumably the fixes in -unstable will make it into xen 3.0.3.
>
> -George
>
>On 6/22/06, Anurag Agarwal <anurag_agarwal@xxxxxxxxxxxx> wrote:
>> Hi,
>>
>> How do I turn on tracing in the Xen. I am using xen 3.0.2. I could not
>> find a config option to turn ON tracing.
>> setsize fails with :
>>
>> # setsize 20
>> Failure to get tbuf info from Xen. Guess size is 0: Invalid argument
>> This may mean that tracing is not enabled in xen.
>> set_size Hypercall failure: Invalid argument
>>
>> May I know how to turn it on?
>>
>> Thanks,
>> Anurag.
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel 
>>
>
>_______________________________________________
>Xen-devel mailing list
>Xen-devel@xxxxxxxxxxxxxxxxxxx
>http://lists.xensource.com/xen-devel 
>
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