CONFIG_LEGACY_PTY_COUNT: Maximum number of legacy PTY in use

General informations

The Linux kernel configuration item CONFIG_LEGACY_PTY_COUNT has multiple definitions:

Maximum number of legacy PTY in use found in drivers/tty/Kconfig

The configuration item CONFIG_LEGACY_PTY_COUNT:

• prompt: Maximum number of legacy PTY in use
• type: int
• depends on: CONFIG_LEGACY_PTYS
• defined in drivers/tty/Kconfig
• found in Linux kernels: 2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.17, 6.18-rc+HEAD

Help text

The maximum number of legacy PTYs that can be used at any one time. The default is 256, and should be more than enough. Embedded systems may want to reduce this to save memory.

When not in use, each legacy PTY occupies 12 bytes on 32-bit architectures and 24 bytes on 64-bit architectures.

Maximum number of legacy PTY in use found in arch/um/Kconfig.char

The configuration item CONFIG_LEGACY_PTY_COUNT:

• prompt: Maximum number of legacy PTY in use
• type: int
• depends on: CONFIG_LEGACY_PTYS
• defined in arch/um/Kconfig.char
• found in Linux kernels: 2.6.14–2.6.39, 3.0–3.1

Help text

The maximum number of legacy PTYs that can be used at any one time. The default is 256, and should be more than enough. Embedded systems may want to reduce this to save memory.

When not in use, each legacy PTY occupies 12 bytes on 32-bit architectures and 24 bytes on 64-bit architectures.

Maximum number of legacy PTY in use found in drivers/char/Kconfig

The configuration item CONFIG_LEGACY_PTY_COUNT:

• prompt: Maximum number of legacy PTY in use
• type: int
• depends on: CONFIG_LEGACY_PTYS
• defined in drivers/char/Kconfig
• found in Linux kernels: 2.6.4–2.6.38

Help text

The maximum number of legacy PTYs that can be used at any one time. The default is 256, and should be more than enough. Embedded systems may want to reduce this to save memory.

When not in use, each legacy PTY occupies 12 bytes on 32-bit architectures and 24 bytes on 64-bit architectures.

Maximum number of legacy PTY in use found in arch/um/Kconfig_char

The configuration item CONFIG_LEGACY_PTY_COUNT:

• prompt: Maximum number of legacy PTY in use
• type: int
• depends on: CONFIG_LEGACY_PTYS
• defined in arch/um/Kconfig_char
• found in Linux kernels: 2.6.9–2.6.13

Help text

The maximum number of legacy PTYs that can be used at any one time. The default is 256, and should be more than enough. Embedded systems may want to reduce this to save memory.

When not in use, each legacy PTY occupies 12 bytes on 32-bit architectures and 24 bytes on 64-bit architectures.

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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