trace points and ABI

[Christian Borntraeger <borntraeger@de.ibm.com>]

On 24/04/12 14:04, Avi Kivity wrote:
>> @@ -74,6 +74,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
>>  	{ "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
>>  	{ "diagnose_10", VCPU_STAT(diagnose_10) },
>>  	{ "diagnose_44", VCPU_STAT(diagnose_44) },
>> +	{ "diagnose_9c", VCPU_STAT(diagnose_9c) },
>>  	{ NULL }
>>  };
>>  
> 
> We're switching to tracepoints instead of homebrewed statistics.  It's
> in feature-removal-schedule.txt already.  It's okay to add them now, but
> please prepare for their removal.
> 

Avi,

Do you consider these tracepoints itself ABI or not?

we are preparing some patches that add trace points in addition to
a: these stats
b: our debug feature

If this is not ABI, then we could work on these trace points step by step,
e.g. first use the existing stat/debug as trace point places, then combine,
add or remove  trace points later on if necessary.

Christian