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Date:      Thu, 07 Aug 2014 15:33:01 -0400
From:      Mike Tancsa <mike@sentex.net>
To:        "freebsd-emulation@freebsd.org" <emulation@freebsd.org>
Subject:   Re: Making disk IO place nicely in a guest (VirtualBox)
Message-ID:  <53E3D46D.1060302@sentex.net>
In-Reply-To: <53E3C33E.5030004@sentex.net>
References:  <53E3C33E.5030004@sentex.net>

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On 8/7/2014 2:19 PM, Mike Tancsa wrote:
> Hi,
>      I am running VirtualBox on RELENG_10 as the hypervisor with a
> RELENG10 guest.  I noticed, that when a do a lot of disk IO in the guest
> where the hypervisor cannot keep up, this start to go "bad" in the guest.
>
> If I use the non default AHCI driver, the OS at least can kind of
> recover.  Using the default IDE drivers (non SATA , things panic quickly.)

Actually, even with the ahci sata controller, the guest will eventually 
panic.  I tried a FreeBSD guest on a Linux Virtualbox hypervisor and it 
did not panic the guest.  Disk IO was consistent.

	---Mike



-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/



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