[haiku-bugs] Re: [Haiku] #11549: System is running slowly mad station memory
- From: "mmlr" <trac@xxxxxxxxxxxx>
- Date: Thu, 04 Dec 2014 08:10:10 -0000
#11549: System is running slowly mad station memory
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Reporter: dxqwx1 | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: - General | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by mmlr):
Note that QEMU Manager uses a very old version of QEMU. It is still using
the old KQEMU driver to achieve reasonable performance and can therefore
not really update further.
This means that this isn't actually hardware virtualized but just runs
some of the machine code that is deemed "safe" directly on the host CPU.
The problem with this is that what is "safe" is highly host and guest
dependent. When QEMU under BeOS/Haiku still used KQEMU there were
combinations that would for example reboot your machine due to registers
being overwritten by the guest that the host still needed. I cannot really
tell whether Haiku uses something that messes up a Windows host when run
under KQEMU, but it is quite possible or even likely.
Overall using Haiku under KQEMU does not really make sense as it is very
outdated and has compatibility problems. You could try to disable KQEMU in
QEMU Manager if there is an option for that. It will run slow, as no part
of the guest will use direct execution, but it should be a lot less
problematic. Using an actual hardware virtualizer like VirtualBox or
VMWare should also work.
As the reported problem is most certainly a host emulation software
problem, there isn't much that Haiku could do to fix it. As suggested,
please try disabling the use of KQEMU and see if this makes it run
normally.
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Ticket URL: <https://dev.haiku-os.org/ticket/11549#comment:4>
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