what's the different in click polling device

kele kele <[email protected]>
Newsgroups gmane.network.routing.click
Message-ID <CAOS0nbc-Gq-92mTuZdBd7T+k6EAKYAKvoep648LZfOaOXnfLAQ@mail.gmail.com> 
        Like the subject, do anyone know what's the different between click
polling driver(with the click polling patch) and other common polling
device driver.
        Thanks.

        Kelei Jin
        Zhe Jiang Gong Shang University
        China
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