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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/block/Kconfig.iosched
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+
+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.
+
+endmenu