CONFIG_IOSCHED_AS: Anticipatory I/O scheduler

General informations

The Linux kernel configuration item CONFIG_IOSCHED_AS has multiple definitions:

Anticipatory I/O scheduler found in block/Kconfig.iosched

The configuration item CONFIG_IOSCHED_AS:

• prompt: Anticipatory I/O scheduler
• type: tristate
• depends on: (none)
• defined in block/Kconfig.iosched
• found in Linux kernels: 2.6.15–2.6.32
• modules built: as-iosched, as-iosched

Help text

The anticipatory I/O scheduler is generally a good choice for most environments, but is quite large and complex when compared to the deadline I/O scheduler, it can also be slower in some cases especially some database loads.

Anticipatory I/O scheduler found in drivers/block/Kconfig.iosched

The configuration item CONFIG_IOSCHED_AS:

• prompt: Anticipatory I/O scheduler
• type: tristate
• depends on: (none)
• defined in drivers/block/Kconfig.iosched
• found in Linux kernels: 2.6.10–2.6.14
• modules built: as-iosched, as-iosched

Help text

The anticipatory I/O scheduler is the default disk scheduler. It is generally a good choice for most environments, but is quite large and complex when compared to the deadline I/O scheduler, it can also be slower in some cases especially some database loads.

Anticipatory I/O scheduler found in drivers/block/Kconfig.iosched

The configuration item CONFIG_IOSCHED_AS:

• prompt: Anticipatory I/O scheduler
• type: bool
• depends on: CONFIG_EMBEDDED
• defined in drivers/block/Kconfig.iosched
• found in Linux kernels: 2.6.0–2.6.9
• modules built: as-iosched, as-iosched

Help text

The anticipatory I/O scheduler is the default disk scheduler. It is generally a good choice for most environments, but is quite large and complex when compared to the deadline I/O scheduler, it can also be slower in some cases especially some database loads.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module as-iosched CONFIG_IOSCHED_AS : block/Kconfig.iosched : "Anticipatory I/O scheduler" # in 2.6.15–2.6.32
• lkddb module as-iosched CONFIG_IOSCHED_AS : drivers/block/Kconfig.iosched : "Anticipatory I/O scheduler" # in 2.6.10–2.6.14

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)

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