From mboxrd@z Thu Jan 1 00:00:00 1970 From: erik quanstrom Date: Fri, 8 Jan 2010 14:23:04 -0500 To: 9fans@9fans.net Message-ID: <2c43c69be41aeb8e0365f250e71f53be@coraid.com> In-Reply-To: <8d4a75e55fc55419d48a3859337bc7da@plan9.bell-labs.com> References: <8d4a75e55fc55419d48a3859337bc7da@plan9.bell-labs.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Subject: Re: [9fans] parallels Topicbox-Message-UUID: ba2166ee-ead5-11e9-9d60-3106f5b1d025 > The thing that none of the VM monitors seem to offer (though I'd love > to be proven wrong) is debugging tools for the guest operating > systems. This is odd, as it was one of the major uses of VM/370. So > if a guest kernel goes off into space, the VM monitor shuts down the > virtual machine or resets it, but provides no means to find out what > happened, though it's in a perfect position to easily do so. it's unfortunate that computer history isn't a bigger component of a computer science degree. in the case of vm, it's not even history; still alive and doing quite well as z/(vm|os) on slightly modified power arch hardware. - erik