[Xen-devel] Question regarding blkif structure

["Daniel Stephen Lee" <dsl5w@xxxxxxxxxxxxxxxxxxxxx>]

Hi,

I am using xen 3.0.3 and was hoping someone could verify my interpretation 
of the blkif structure.
As I understand it, within each domU, there can be any number of front end 
drivers, each with their own event channel and shared ring etc.  All of the 
front end drivers within a specified domU communicate with a single blkif 
structure that is designated for that domU.  That blkif is stored in a hash 
in dom0 along with other blkifs for other domains.  All of the blkifs 
communicate with the physical device drivers via a kernel thread spawned by 
the backend driver at startup.  The I/O requests are then serviced 
round-robin style.
If my interpretation is correct, my next question would be has anyone ever 
written anything to service the requests with regard to a priority level of 
some sort?
Thank you in advance for the help,
Daniel Lee

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