Staging
v0.8.1
v0.8.1
https://github.com/torvalds/linux
Revision 05a8057bb38bc803682f3e0af305c258b4566285 authored by Linus Torvalds on 04 January 2007, 20:55:56 UTC, committed by Linus Torvalds on 04 January 2007, 20:55:56 UTC
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SOUND] Sparc CS4231: Use 64 for period_bytes_min [SOUND] Sparc CS4231: Fix IRQ return value and initialization.
Tip revision: 05a8057bb38bc803682f3e0af305c258b4566285 authored by Linus Torvalds on 04 January 2007, 20:55:56 UTC
Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
Tip revision: 05a8057
Kconfig.iosched
if BLOCK
menu "IO Schedulers"
config IOSCHED_NOOP
bool
default y
---help---
The no-op I/O scheduler is a minimal scheduler that does basic merging
and sorting. Its main uses include non-disk based block devices like
memory devices, and specialised software or hardware environments
that do their own scheduling and require only minimal assistance from
the kernel.
config IOSCHED_AS
tristate "Anticipatory I/O scheduler"
default y
---help---
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.
config IOSCHED_DEADLINE
tristate "Deadline I/O scheduler"
default y
---help---
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.
config IOSCHED_CFQ
tristate "CFQ I/O scheduler"
default y
---help---
The CFQ I/O scheduler tries to distribute bandwidth equally
among all processes in the system. It should provide a fair
working environment, suitable for desktop systems.
choice
prompt "Default I/O scheduler"
default DEFAULT_CFQ
help
Select the I/O scheduler which will be used by default for all
block devices.
config DEFAULT_AS
bool "Anticipatory" if IOSCHED_AS=y
config DEFAULT_DEADLINE
bool "Deadline" if IOSCHED_DEADLINE=y
config DEFAULT_CFQ
bool "CFQ" if IOSCHED_CFQ=y
config DEFAULT_NOOP
bool "No-op"
endchoice
config DEFAULT_IOSCHED
string
default "anticipatory" if DEFAULT_AS
default "deadline" if DEFAULT_DEADLINE
default "cfq" if DEFAULT_CFQ
default "noop" if DEFAULT_NOOP
endmenu
endif
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