CONFIG_DEFERRED_STRUCT_PAGE_INIT: Defer initialisation of struct pages to kthreads

General informations

The Linux kernel configuration item CONFIG_DEFERRED_STRUCT_PAGE_INIT has multiple definitions:

Defer initialisation of struct pages to kthreads found in mm/Kconfig

The configuration item CONFIG_DEFERRED_STRUCT_PAGE_INIT:

• prompt: Defer initialisation of struct pages to kthreads
• type: bool
• depends on: ( CONFIG_SPARSEMEM ) && (! CONFIG_NEED_PER_CPU_KM ) && ( CONFIG_64BIT ) && (! CONFIG_KMSAN )
• defined in mm/Kconfig
• found in Linux kernels: 4.5–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

Ordinarily all struct pages are initialised during early boot in a single thread. On very large machines this can take a considerable amount of time. If this option is set, large machines will bring up a subset of memmap at boot and then initialise the rest in parallel. This has a potential performance impact on tasks running early in the lifetime of the system until these kthreads finish the initialisation.

Defer initialisation of struct pages to kswapd found in mm/Kconfig

The configuration item CONFIG_DEFERRED_STRUCT_PAGE_INIT:

• prompt: Defer initialisation of struct pages to kswapd
• type: bool
• depends on: ( CONFIG_ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT ) && ( CONFIG_MEMORY_HOTPLUG )
• defined in mm/Kconfig
• found in Linux kernels: 4.2–4.4

Help text

Ordinarily all struct pages are initialised during early boot in a single thread. On very large machines this can take a considerable amount of time. If this option is set, large machines will bring up a subset of memmap at boot and then initialise the rest in parallel when kswapd starts. This has a potential performance impact on processes running early in the lifetime of the systemm until kswapd finishes the initialisation.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

Automatic links from Google (and ads)

Custom Search

Popular queries: