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SubjectRe: [RFC] sysfs kobject that doesn't trigger hotplug events
Dmitry Torokhov wrote:

> 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.



Actually for every kobj_type structure, not for every kobject. Doing a
quick scan through the kernel I found 25 kobj_type decelerations so that
would add up to 100 bytes only. And that could be made a byte or flags
field.

I wasn't sure if it was possible to create a subsystem that wasn't a
part of the sysfs tree that contained kobjects that were. Looking
trough the code again it looks like it is so I'll use the hotplug filter
as you suggest.

John


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