> You would need to modify ib_umem_get() to check for the VM_PFNMAP > flag and build the struct ib_umem similar to the proposed > ib_iomem_get(). However, the page reference counting/sharing issue > would need to be solved. I think there are kernel level callbacks > for this that could be used.
But in this case the pages are already mmaped into a user process, there must be some mechanism to ensure they don't get pulled away?! Though, I guess, what happens if you hot un-plug the PCI-E card that has a process mmaping its memory?! What happens if you RDMA READ from PCI-E address space that does not have any device responding? Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
