[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Is continuous replication of state possible?
On Fri, 7 Jan 2005, Ian Pratt wrote: On Fri, 7 Jan 2005, Ian Pratt wrote:It basically just requires deterministic execution and event injection.This will be hard when running crypto programs that get their random numbers directly from the CPU ...Sure, when CPUs finally get embedded crypto features (and applications start using and _insisting_ on their presence) we'll have problems. For the moment, the technique should work. Of course, it should be easy for CPU manufacturers to make sure that the crypto instructions are trappable, so Xen can make sure that both lockstepped virtual machines get the same random number ... -- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
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