From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: To: 9fans@cse.psu.edu Subject: Re: [9fans] From our "not quite grasping the concept" file From: erik quanstrom Date: Thu, 8 Nov 2007 10:20:04 -0500 In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: ef75d206-ead2-11e9-9d60-3106f5b1d025 > 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. modern devices usually dma directly, so the host may never need to touch the pointed-to memory. perhaps using Fcall structures directly would be more efficient? - erik