[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Is there data copy between dom0 and domU
On Wed, Apr 23, 2014 at 12:06:51PM -0400, xu cong wrote: > When applications running in domU receive/send data from/to network, is > there data copy via shared memory between dom0 and domU? Or the zero copy > is used. How about the disk I/O operations? Thanks. If you're using latest kernel (3.14-ish), guest TX path is zero-copy, otherwise it's using copy. For RX path it always copies. I think disk always copies data. But I'm not sure. Wei. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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