[Xen-devel] problems with netback

["Zang Hongyong" <zanghongyong@xxxxxxxxxx>]

hi
I've some problems with netback
1.what's mmap_pages for, which come from balloon operation ？
mmap_pages = alloc_empty_pages_and_pagevec(MAX_PENDING_REQS)

2.what's the meaning of "refcnt" defined in netif_t (netif->refcnt)

3.irq enable and disable
such as disable_irq(netif->irq);
why netback use such enable & disable operations while netfront dont use for 
its irq?

4.blank "resume" operation for netback
why netfront has "resueme" defined, while not in netback?
which event will result in calling the "resume" function?

thanks in advance!

Zang Hongyong
zanghongyong@xxxxxxxxxx
2008-06-02

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