Re: [RFC] sysfs kobject that doesn't trigger hotplug events

[Dmitry Torokhov <dtor_core@ameritech.net>]

On Tuesday 18 May 2004 09:11 pm, John Zielinski wrote:
> I'm adding some data structures to a device and want them to appear 
> under that device in sysfs in subdirectories.  These data structures are 
> linked together in a tree like layout so it would make sense to have 
> them have a subdirectory tree representing them.  These data structures 
> have a kobject for reference counting and I can use kobject_add and 
> kobject_del to add them to the sysfs tree.
> 
> Looking through the kobject.c code I noticed that this would create a 
> lot of hotplug events which would burn up a bit of processor time.  
> These events are not necessary as these are not device kobjects.  I've 
> enclosed a patch to my solution for this.  I'd like to know if there are 
> any side effects with this method.
> 

You are wasting 4 bytes for every kobject out there. Just implement your
private hotplug callback that would return something like -ENODEV so the
hotplug helper would not be called. If needed you can call kobject_hotplug
later, when you are ready. 

-- 
Dmitry