--- Day changed

--- Log opened Fri May 27 23:59:02 2005
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03:08  * knewt conks himself over the head and notes that in future it would be a good idea to sync up with the latest -testing before doing a bugfix
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07:53 < Treibholz> hi
07:56 < Treibholz> is it possible to set the nice-level of a machine?
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14:23 < grifferz> if I want to specify a vif name, do I change..
14:23 < grifferz> vif=[ 'mac=aa:00:00:13:5c:a4, bridge=xen-br0' ]
14:23 < grifferz> to read
14:24 < grifferz> vif=[ 'mac=aa:00:00:13:5c:a4, bridge=xen-br0, vifname=vifwhatever' ]
14:24 < grifferz> ?
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15:48 < grifferz> I upgraded to 2.0-testing as of 25/05 and now xend won't start :(.  it doesn't give any error whatsoever, it just returns to the prompt. a pidfile is created but the pid doesn't exist
15:48 < grifferz> trying to strace it now
15:51 < grifferz> hmm the xfrd does stay running, that's the oly process that does however
15:52 < grifferz> yeah that is just listening on port 8002 now
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15:58 < grifferz> ok I think I see the problem, or at least a problem
15:58 < grifferz> it tries to find channel.py which I have in..
15:58 < grifferz> /usr/lib/python2.3/xen/xend/server/channel.py
15:58 < grifferz> but it never looks there
15:59 < grifferz> the closest it gets is variations on
15:59 < grifferz> open("/usr/local/lib/python2.3/site-packages/channel.py", O_RDONLY|O_LARGEFILE)
15:59 < grifferz> = -1 ENOENT (No such file or directory)
15:59 < grifferz> I'm clueless at python, anyone know how I might fix this? :/
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16:48 < Zxcvb_> will there be any limits to the CPU virtualization once IBM's code is added in?
16:49 < riel> what kind of limits do you mean ?
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16:56 < Zxcvb_> riel: like with it would you be able to run software that relies on 32 bit real mode for example
16:56 < riel> 32 bit real mode is a bit far fetched
16:56 < riel> not sure if that would run
16:57 < Zxcvb_> riel: right now the only way to do it is to either emulate the whole CPU or patch the app as it is loaded into RAM replacing all 32 bit real mode functions with breakpoints and using other software to catch the breakpoint and emulate the function
16:57 < riel> but hey, it _might_ work
16:58 < Zxcvb_> riel: if real mode and 32 bit flat real mode worked then newxen code could be added to dosbox for a huge speed boost on x86 systems
16:58 < riel> AMD's Pacifica might be a little bit better in the "run virtual machines in strange modes" department - but I'm not sure if that's at a performance cost due to more complexity ;)
16:59 < Zxcvb_> riel: voodoo is a pain and so is JEMM
16:59 < riel> Zxcvb_: on x86 systems with VT, right ?
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16:59 < Zxcvb_> riel: VT?
16:59 < riel> Zxcvb_: hardware assisted virtualization
17:00 < Zxcvb_> riel: isn't IBM's new stuff for xen supposed to make xen more like vmware in terms of compatibility?
17:01 < Zxcvb_> riel: flat real mode software works in vmware but vmware has crappy VESA and sound support
17:02 < Zxcvb_> riel: supposedly some code was supposed to be added to xen to allow unmodified guest OSes to run
17:03 < riel> vmware has to do some extremely scary things to make that work ;)
17:03 < riel> IIRC x86 has 13 instructions that are simply not virtualizable
17:03 < riel> so vmware has to rewrite all pages with instructions in them on the fly
17:04 < Zxcvb_> riel: hopefully most DOS games won't use that at all
17:04 < riel> which interferes badly with eg. debuggers
17:04 < riel> I hope Xen won't grow code like that ;)
17:04 < Zxcvb_> riel: can xen virtualize everything except those 13 instructions?
17:04 < riel> instead, Xen can just rely on the virtualization features in newer CPUs
17:06 < riel> Zxcvb_: with VT (or Pacifica) those instructions become virtualizable
17:06 < Zxcvb_> riel: what CPU is required for VT/pacifica?
17:07 < riel> very very very new Pentium IV CPUs have the "vt" or "vmx" feature
17:07 < riel> I'm not sure whether they've already hit the market, or are about to hit the market
17:07 < riel> but I know they work very well
17:07 < Zxcvb_> riel: you wouldn't happen to know the theoretical maximum performance of an x86->x86 dynarec emulator would you?
17:10 < riel> HP's Dynamo project has shown better than native performance in some circumstances
17:10 < Zxcvb_> riel: that was risc->risc
17:10 < riel> simply because at run-time you can do some optimisations that aren't possible at compile time
17:11 < Zxcvb_> riel: I doubt even with VT/Pacifica you could handle something as dirty as qemm stealth (put an EMS page frame over the video BIOS area below 1MB and when a video interrupt happens, switch the video bios back to it's original location, handle the interrupt, then move the ems page frame back over the video bios
17:12 < riel> that is an extremely dirty trick indeed 
17:13 < Zxcvb_> riel: JEMM is similar, it moves everything below 1MB elsewhere
17:13 < Zxcvb_> riel: Privateer used JEMM
17:14 < Zxcvb_> riel: but I bet even in the Windows/ReactOS world there are drivers (Starforce/Safedisc/etc) that use similar tricks
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17:32  * grifferz gets nowhere with xend :(
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21:26 -!- services.oftc.net changed the topic of #xen to: Xen Homepage->  http://www.cl.cam.ac.uk/Research/SRG/netos/xen/index.html || Xen Wiki -> http://wiki.xensource.com || vm-tools : http://www.cs.utexas.edu/users/aliguori/vm-tools/
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22:54 < demon> anyone know why the FreeBSD 5.3/Xen kernel halts when you tell it to reboot, instead of rebooting?
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--- Log closed Sat May 28 23:59:00 2005