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some typo fixes

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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
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Wolfgang Bumiller 2018-01-10 11:45:49 +01:00
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@ -311,7 +311,7 @@ The *PCID* CPU flag helps to improve performance of the Meltdown vulnerability
footnote:[Meltdown Attack https://meltdownattack.com/] mitigation approach. In footnote:[Meltdown Attack https://meltdownattack.com/] mitigation approach. In
Linux the mitigation is called 'Kernel Page-Table Isolation (KPTI)', which Linux the mitigation is called 'Kernel Page-Table Isolation (KPTI)', which
effectively hides the Kernel memory from the user space, which, without PCID, effectively hides the Kernel memory from the user space, which, without PCID,
is a expensive operation footnote:[PCID is now a critical performance/security is an expensive operation footnote:[PCID is now a critical performance/security
feature on x86 feature on x86
https://groups.google.com/forum/m/#!topic/mechanical-sympathy/L9mHTbeQLNU]. https://groups.google.com/forum/m/#!topic/mechanical-sympathy/L9mHTbeQLNU].
@ -321,16 +321,16 @@ There are two requirements to reduce the cost of the mitigation:
* The guest Operating System must be updated to a version which mitigates the * The guest Operating System must be updated to a version which mitigates the
attack and utilizes the PCID feature marked by its flag. attack and utilizes the PCID feature marked by its flag.
To check if the {pve} host support PCID, execute the following command as root: To check if the {pve} host supports PCID, execute the following command as root:
---- ----
# grep ' pcid ' /proc/cpuinfo # grep ' pcid ' /proc/cpuinfo
---- ----
If this does not return empty your hosts CPU has support for PCID. If you use If this does not return empty your host's CPU has support for PCID. If you use
`host' as CPU type and the guest OS is able to use it, your done. `host' as CPU type and the guest OS is able to use it, you're done.
Else, the PCID CPU flag needs to get set for the virtual CPU. This can be done, Otherwise you need to set the PCID CPU flag for the virtual CPU. This can be
for example, by editing the CPU through the WebUI. done by editing the CPU options through the WebUI.
NUMA NUMA
^^^^ ^^^^