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Re: [Xen-devel] mapped memory delay?

Mark Williamson wrote:
If you're sharing memory directly between the two then you don't need to involve xcs (other than in the setup phase) since that just does control messages.

You might find the ring macros in xen/include/public/ring.h useful. They make it easy to declare ring datatypes (with appropriately sized rings) and maintain producer / consumer indexes, with the appropriate memory barriers.

Examples of use are in linux-2.6.10-xen-sparse/drivers/xen/{blk,usb}
{back,front}. (the net drivers use a slightly different ring format instead).

Hmm will this be any different if the guy I wish to share this with in dom0 is a userspace process? Can I use /dev/evtchn for that, or do I have to cook my own device node for this?



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