From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <432057DB.2060302@lanl.gov> Date: Thu, 8 Sep 2005 09:25:15 -0600 From: Ronald G Minnich User-Agent: Mozilla Thunderbird 1.0.2 (X11/20050317) MIME-Version: 1.0 To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu> Subject: Re: [9fans] hacking issue: memory resizing References: <431F0B19.9030400@lanl.gov> <600308d605090708597bc20a20@mail.gmail.com> <431F2CD2.2040606@lanl.gov> <43202591.1030201@anvil.com> In-Reply-To: <43202591.1030201@anvil.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: 85b90cae-ead0-11e9-9d60-3106f5b1d025 Dave Lukes wrote: > Ron, > 'Scuse my ignorance, > but presumably you're thinking about some kind of tepid-swap > (OS migrates processes off the board and tells you when you can unplug it) > arrangement? yes, or more aggressive: OS remaps virtual memory and then removes that physical memory from the maps. I mean, if the DIMM with your kernel is bad, it's all over; but if it is some other DIMM, well, maybe it won't be too hard. Or maybe it will. Needed for hot plug memory and xen. Also, the memory rmap needs rewriting anyway; here's a chance to get this done. Also, there's not enough kernel discussion on this list (as per the town meeting log). So I am trying to incite some. ron