CONFIG_IOSCHED_DEADLINE: Deadline I/O scheduler

General informations

The Linux kernel configuration item CONFIG_IOSCHED_DEADLINE has multiple definitions:

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

The configuration item CONFIG_IOSCHED_DEADLINE:

• prompt: Deadline I/O scheduler
• type: tristate
• depends on: (none)
• defined in block/Kconfig.iosched
• found in Linux kernels: 2.6.15–2.6.39, 3.0–3.19, 4.0–4.20
• modules built: deadline-iosched, deadline-iosched

Help text

The deadline I/O scheduler is simple and compact. It will provide CSCAN service with FIFO expiration of requests, switching to a new point in the service tree and doing a batch of IO from there in case of expiry.

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

The configuration item CONFIG_IOSCHED_DEADLINE:

• prompt: Deadline 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: deadline-iosched, deadline-iosched

Help text

The deadline I/O scheduler is simple and compact, and is often as good as the anticipatory I/O scheduler, and in some database workloads, better. In the case of a single process performing I/O to a disk at any one time, its behaviour is almost identical to the anticipatory I/O scheduler and so is a good choice.

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

The configuration item CONFIG_IOSCHED_DEADLINE:

• prompt: Deadline 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: deadline-iosched, deadline-iosched

Help text

The deadline I/O scheduler is simple and compact, and is often as good as the anticipatory I/O scheduler, and in some database workloads, better. In the case of a single process performing I/O to a disk at any one time, its behaviour is almost identical to the anticipatory I/O scheduler and so is a good choice.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module deadline-iosched CONFIG_IOSCHED_DEADLINE : block/Kconfig.iosched : "Deadline I/O scheduler" # in 2.6.15–2.6.39, 3.0–3.19, 4.0–4.20
• lkddb module deadline-iosched CONFIG_IOSCHED_DEADLINE : drivers/block/Kconfig.iosched : "Deadline 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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