[PATCH v7 2/7] lib/ref_tracker: improve printing stats

[Andrzej Hajda]

On 21.04.2023 16:21, Eric Dumazet wrote:
> On Fri, Apr 21, 2023 at 1:35 PM Andrzej Hajda <andrzej.hajda at intel.com> wrote:
>> In case the library is tracking busy subsystem, simply
>> printing stack for every active reference will spam log
>> with long, hard to read, redundant stack traces. To improve
>> readabilty following changes have been made:
>> - reports are printed per stack_handle - log is more compact,
>> - added display name for ref_tracker_dir - it will differentiate
>>    multiple subsystems,
>> - stack trace is printed indented, in the same printk call,
>> - info about dropped references is printed as well.
>>
>> Signed-off-by: Andrzej Hajda <andrzej.hajda at intel.com>
>> Reviewed-by: Andi Shyti <andi.shyti at linux.intel.com>
>> ---
>>   include/linux/ref_tracker.h | 15 ++++++--
>>   lib/ref_tracker.c           | 90 +++++++++++++++++++++++++++++++++++++++------
>>   2 files changed, 91 insertions(+), 14 deletions(-)
>>
>> diff --git a/include/linux/ref_tracker.h b/include/linux/ref_tracker.h
>> index 87a92f2bec1b88..fc9ef9952f01fd 100644
>> --- a/include/linux/ref_tracker.h
>> +++ b/include/linux/ref_tracker.h
>> @@ -17,12 +17,19 @@ struct ref_tracker_dir {
>>          bool                    dead;
>>          struct list_head        list; /* List of active trackers */
>>          struct list_head        quarantine; /* List of dead trackers */
>> +       char                    name[32];
>>   #endif
>>   };
>>
>>   #ifdef CONFIG_REF_TRACKER
>> -static inline void ref_tracker_dir_init(struct ref_tracker_dir *dir,
>> -                                       unsigned int quarantine_count)
>> +
>> +/* Temporary allow two and three arguments, until consumers are converted */
>> +#define ref_tracker_dir_init(_d, _q, args...) _ref_tracker_dir_init(_d, _q, ##args, #_d)
>> +#define _ref_tracker_dir_init(_d, _q, _n, ...) __ref_tracker_dir_init(_d, _q, _n)
>> +
> We only have four callers of ref_tracker_dir_init() .
>
> Why not simply add a name on them, and avoid this magic ?

If this can be done in one patch, that's great.

Regards
Andrzej