On Sun, 11 Mar 2018 20:47:11 +0100, Antoine Pitrou wrote:
>On Sun, 11 Mar 2018 15:35:28 +0100
>Teach <pbrte...@gmail.com> wrote:
>>  It is recommended to run windows 10 in Virtualbox under Xubuntu
>> 17.10 *Virtualbox or VMWare?*  
>Just for the record, Virtualbox is user-friendly but not very fast.  If
>you need your Windows VM to be performant you probably want to use
>another hypervisor (such as KVM with virt-manager, or perhaps VMWare).

Pff, I'm running Windows 7 in Virtualbox using the slower QCOW instead
of vbox's defaoult VDI from a SSD. If there should be any performance
issues consider to boot with  nokaiser  or  nopti. Yes, using vbox with
a HDD is a PITA, but when using a SSD there should be no performance
issues. However, as of rencently I expereinced some performance issues,
too, but I didn't run vbox with page-table isolation disabled, to
compare if PTI is really the culprit.

IIRC current *buntu kernels provide the "nokaiser" boot option, for my
Arch Linux kernels I'm using the newer "nopti" boot option.

"Normal" boot:

[rocketmouse@archlinux ~]$ cat /sys/devices/system/cpu/vulnerabilities/*
Mitigation: PTI
Mitigation: __user pointer sanitization
Mitigation: Full generic retpoline

When booting with "nopti".

[rocketmouse@archlinux ~]$ cat /sys/devices/system/cpu/vulnerabilities/*
Mitigation: __user pointer sanitization
Mitigation: Full generic retpoline


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