[Xen-devel] simple question on frontend network driver and decreasing reservation

[ron minnich <rminnich@xxxxxxxx>]

the frontend driver, in network_alloc_rx_buffers, allocates pages and then 
hands them off to xen for the rx ring, using MEMOP_decrease_reservation. 
Just checking, but I assume this actually decreases the domain's 
allowed memory footprint? 

At poll_if time, it reclaims pages from the rx queue by mapping them back 
in (I hope I got this right). 

Now I assume that as it pulls those pages back in to the domain, the 
domain's allowed page count is increased for each page it pulls in? Just 
curious. 

thanks

ron



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