Most of flow table modification are done in genl callback which are called under global genl_mutex. You can refer to locking related comment in datapath.c for details.
Thanks, Pravin. On Fri, Oct 12, 2012 at 7:32 AM, ankur dwivedi <ankurengg2...@gmail.com> wrote: > Hi, > > In the flow table present in the datapath,ovs_flow_tbl_insert is the > functions which inserts flow in the flow table. > > I find that it uses the hlist_add_head_rcu function to insert flows in the > table. But the man page for this function says the following > "The caller must take whatever precautions are necessary (such as holding > appropriate locks) to avoid racing with another list-mutation primitive, > such as hlist_add_head_rcu or hlist_del_rcu, running on this same list." > > So should not ovs_flow_tbl_insert function take a lock before inserting any > flow or there will be only one request at a time? > > > > -- > Thanks > > Ankur Dwivedi > > > > _______________________________________________ > dev mailing list > dev@openvswitch.org > http://openvswitch.org/mailman/listinfo/dev > _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
