[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] question on iommu _map_page
Hi all, I am trying to use the VT-d support with a PV driver domain which performs network I/O on behalf of guest domains. When I initiate any network I/O it results in I/O page faults. On taking a closer look I find that iommu_map_page() is called only for writable pages from __gnttab_map_grant_ref(). This results in page faults during packet transmission since pages are mapped read-only in this case. When I remove this restriction, I can get it working without any page faults. Is this a bug? or am I missing something here? I am using the latest unstable version of Xen. This part of the source code hasn't changed in a long time. Thanks! -Kaushik _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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