Re: [PATCH v2 4/4] livepatch/shadow: Add garbage collection of shadow variables

Josh Poimboeuf
2023-02-01T00:18:31Z

On Wed, Oct 26, 2022 at 04:41:22PM -0300, Marcos Paulo de Souza wrote:
> The shadow variable type might then be added into a new @shadow_types
> member of struct klp_object. They will get then automatically registered
> and unregistered when the object is being livepatched. The registration
> increments the reference count. Unregistration decreases the reference
> count. All shadow variables of the given type are freed when the reference
> count reaches zero.

How does the automatic unregistration work for replaced patches?

I see klp_unpatch_replaced_patches() is called, but I don't see where it
ends up calling klp_shadow_unregister() for the replaced patch(es).

--
Josh