[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] xs transaction
>From: Vincent Hanquez [mailto:vincent@xxxxxxxxxxxxx] >Sent: 2007年9月11日 19:45 > >xenstored is single threaded and the libxs accesses are serialed through >a mutex which prevent two threads to access the ring at the same time. >if it was not, you'ld have much more problems than having two >transactions at the same time. > >xenstored will always complete a process_message function until it try >to read a new packet. at this point the conn->transaction is back to >NULL. Thanks, and I see the point now. > >> Since we're sure that current implementation doesn't handle parallel >> transactions (though API level allows), I think do_transaction_start >> should check conn->transaction_list instead of conn->transaction to >> ensure it. > >how are you sure it doesn't handle parallel transactions ? My fault actually and it does handle. If multiple transactions are in parallel, 1st end will update its changes into global tdb with the rest failed (EAGAIN) to caller for retry. :-) Thanks, Kevin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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