From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: Date: Thu, 8 Nov 2007 10:10:00 -0600 From: "Eric Van Hensbergen" To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu> Subject: Re: [9fans] From our "not quite grasping the concept" file In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: Topicbox-Message-UUID: ef813cc2-ead2-11e9-9d60-3106f5b1d025 On Nov 8, 2007 9:20 AM, erik quanstrom wrote: > > The opportunity still exists -- only one driver needs to implement > > their numeric hack - 9p. Then the rest can be based off of that. > > Unfortunately, evolution just comes slow and painful. > > > > -eric > > are 9p mesages really the right vehicle for this? 9p messages > provides a serialized and in a standard byte order. this requires > byte reordering (on intel) and copying. but are these really needed? > the guest and host are on the same platform, so the guest can > pass pointers to the host. for the same reason, integers don't need > reformatting. > 9p is the right organizational structure. The details of marshalling and pass-by-copy versus pass-by-reference are transport issues. Lucho and I have been playing with zero-marhsalling/zero-copy transport variants of 9P for virtualized environments. -eric