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Date:      Sat, 29 Dec 2007 22:09:20 +1300
From:      "James Butler" <sweetnavelorange@gmail.com>
To:        current@freebsd.org, silby@silby.com
Subject:   Re: [patch] Auto-setting hz to 100 inside QEMU/VMWare
Message-ID:  <f0dd9eb90712290109g31f240dalfb9710a855109221@mail.gmail.com>

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> When running FreeBSD inside QEMU / VMWare, one of my pet peeves is that
> time is completely inaccurate.  This seems to be cured by setting
> kern.hz=100 (down from the default of 1000) in /boot/loader.conf, but I'm
> getting sick of doing that every time I set up a virtual box.
>
> So, here's a patch to have the kernel auto-detect that it's running inside
> one of those two environments and automatically make that adjustment.
>
> If you're running FreeBSD inside any other virtual environments
> (Parallels?  Microsoft Virtual PC?) and can detect them via data in kenv,
> I'll be happy to add them to the patch as well.

On innotek VirtualBox: hint.acpi.0.oem="VBOX  "

>
> I have only tested this patch in QEMU so far, I will test inside VMWare
> tomorrow.
>
> If anyone could review and/or test this, it would be appreciated.
>
> Thanks,
>
> Mike "Silby" Silbersack

Thanks,
James Butler



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