On 7/17/07, Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
> without too much knowledge of each other. BTW, what are the semantics
> of css_put() is it expected to free the container/run the release agent
> when the reference count of the container_subsys_state drops to zero?
>

If you css_put() the last reference on a subsystem state object and
the associated container is marked as notify_on_release, then
check_for_release() is called which does a more full check of whether
the container is releasable. If it is, a workqueue task is scheduled
to run the userspace release agent, which can then do anything it
wants, including potentially deleting the empty container.

Paul
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