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CONFIG_PARAVIRT: Enable paravirtualization code

General informations

The Linux kernel configuration item CONFIG_PARAVIRT has multiple definitions:

found in arch/ia64/Kconfig

The configuration item CONFIG_PARAVIRT:

• prompt:
• type: bool
• depends on: CONFIG_PARAVIRT_GUEST
• defined in arch/ia64/Kconfig
• found in Linux kernels: 2.6.28–2.6.39, 3.0–3.5

Help text

This changes the kernel so it can modify itself when it is run under a hypervisor, potentially improving performance significantly over full virtualization. However, when run without a hypervisor the kernel is theoretically slower and slightly larger.

found in arch/x86/Kconfig

The configuration item CONFIG_PARAVIRT:

• prompt:
• type: bool
• depends on: CONFIG_X86_32 && !( CONFIG_X86_VISWS || CONFIG_X86_VOYAGER )
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.24

Help text

This changes the kernel so it can modify itself when it is run under a hypervisor, potentially improving performance significantly over full virtualization. However, when run without a hypervisor the kernel is theoretically slower and slightly larger.

Enable paravirtualization code found in arch/ia64/Kconfig

The configuration item CONFIG_PARAVIRT:

• prompt: Enable paravirtualization code
• type: bool
• depends on: CONFIG_PARAVIRT_GUEST
• defined in arch/ia64/Kconfig
• found in Linux kernels: 3.6–3.19, 4.0–4.1

Help text

This changes the kernel so it can modify itself when it is run under a hypervisor, potentially improving performance significantly over full virtualization. However, when run without a hypervisor the kernel is theoretically slower and slightly larger.

Enable paravirtualization code found in arch/x86/Kconfig

The configuration item CONFIG_PARAVIRT:

• prompt: Enable paravirtualization code
• type: bool
• depends on: (none)
• defined in arch/x86/Kconfig
• found in Linux kernels: 2.6.25–2.6.39, 3.0–3.19, 4.0–4.2, 4.4-rc+HEAD

Help text

This changes the kernel so it can modify itself when it is run under a hypervisor, potentially improving performance significantly over full virtualization. However, when run without a hypervisor the kernel is theoretically slower and slightly larger.

Paravirtualization support (EXPERIMENTAL) found in arch/i386/Kconfig

The configuration item CONFIG_PARAVIRT:

• prompt: Paravirtualization support (EXPERIMENTAL)
• type: bool
• depends on: ( CONFIG_EXPERIMENTAL ) && (!( CONFIG_X86_VISWS || CONFIG_X86_VOYAGER ))
• defined in arch/i386/Kconfig
• found in Linux kernels: 2.6.20–2.6.23

Help text

Paravirtualization is a way of running multiple instances of Linux on the same machine, under a hypervisor. This option changes the kernel so it can modify itself when it is run under a hypervisor, improving performance significantly. However, when run without a hypervisor the kernel is theoretically slower. If in doubt, say N.

Hardware

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The data is retrived from:

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