diff options
author | Ingo Molnar <mingo@elte.hu> | 2005-06-25 14:57:36 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:45 -0700 |
commit | cc19ca86a023fcd552c78e77a7be6ce271f92a28 (patch) | |
tree | b4e9c9b02b73105d363070c49a765208b99cee1a | |
parent | 7f1867a5b3dc3034cbea403b229d65eed4a7f62e (diff) | |
download | kernel_samsung_tuna-cc19ca86a023fcd552c78e77a7be6ce271f92a28.zip kernel_samsung_tuna-cc19ca86a023fcd552c78e77a7be6ce271f92a28.tar.gz kernel_samsung_tuna-cc19ca86a023fcd552c78e77a7be6ce271f92a28.tar.bz2 |
[PATCH] consolidate PREEMPT options into kernel/Kconfig.preempt
This patch consolidates the CONFIG_PREEMPT and CONFIG_PREEMPT_BKL
preemption options into kernel/Kconfig.preempt. This, besides reducing
source-code, also enables more centralized tweaking of preemption related
options.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r-- | arch/i386/Kconfig | 23 | ||||
-rw-r--r-- | arch/ppc64/Kconfig | 21 | ||||
-rw-r--r-- | arch/x86_64/Kconfig | 29 | ||||
-rw-r--r-- | kernel/Kconfig.preempt | 24 |
4 files changed, 28 insertions, 69 deletions
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index b4cd11e..961ab20 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -510,28 +510,7 @@ config SCHED_SMT cost of slightly increased overhead in some places. If unsure say N here. -config PREEMPT - bool "Preemptible Kernel" - help - This option reduces the latency of the kernel when reacting to - real-time or interactive events by allowing a low priority process to - be preempted even if it is in kernel mode executing a system call. - This allows applications to run more reliably even when the system is - under load. - - Say Y here if you are building a kernel for a desktop, embedded - or real-time system. Say N if you are unsure. - -config PREEMPT_BKL - bool "Preempt The Big Kernel Lock" - depends on PREEMPT - default y - help - This option reduces the latency of the kernel by making the - big kernel lock preemptible. - - Say Y here if you are building a kernel for a desktop system. - Say N if you are unsure. +source "kernel/Kconfig.preempt" config X86_UP_APIC bool "Local APIC support on uniprocessors" diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig index cb27068..5f40b43 100644 --- a/arch/ppc64/Kconfig +++ b/arch/ppc64/Kconfig @@ -270,26 +270,7 @@ config SCHED_SMT when dealing with POWER5 cpus at a cost of slightly increased overhead in some places. If unsure say N here. -config PREEMPT - bool "Preemptible Kernel" - help - This option reduces the latency of the kernel when reacting to - real-time or interactive events by allowing a low priority process to - be preempted even if it is in kernel mode executing a system call. - - Say Y here if you are building a kernel for a desktop, embedded - or real-time system. Say N if you are unsure. - -config PREEMPT_BKL - bool "Preempt The Big Kernel Lock" - depends on PREEMPT - default y - help - This option reduces the latency of the kernel by making the - big kernel lock preemptible. - - Say Y here if you are building a kernel for a desktop system. - Say N if you are unsure. +source "kernel/Kconfig.preempt" config EEH bool "PCI Extended Error Handling (EEH)" if EMBEDDED diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index 92f5a52..a853d87 100644 --- a/arch/x86_64/Kconfig +++ b/arch/x86_64/Kconfig @@ -207,33 +207,6 @@ config SMP If you don't know what to do here, say N. -config PREEMPT - bool "Preemptible Kernel" - ---help--- - This option reduces the latency of the kernel when reacting to - real-time or interactive events by allowing a low priority process to - be preempted even if it is in kernel mode executing a system call. - This allows applications to run more reliably even when the system is - under load. On contrary it may also break your drivers and add - priority inheritance problems to your system. Don't select it if - you rely on a stable system or have slightly obscure hardware. - It's also not very well tested on x86-64 currently. - You have been warned. - - Say Y here if you are feeling brave and building a kernel for a - desktop, embedded or real-time system. Say N if you are unsure. - -config PREEMPT_BKL - bool "Preempt The Big Kernel Lock" - depends on PREEMPT - default y - help - This option reduces the latency of the kernel by making the - big kernel lock preemptible. - - Say Y here if you are building a kernel for a desktop system. - Say N if you are unsure. - config SCHED_SMT bool "SMT (Hyperthreading) scheduler support" depends on SMP @@ -244,6 +217,8 @@ config SCHED_SMT cost of slightly increased overhead in some places. If unsure say N here. +source "kernel/Kconfig.preempt" + config K8_NUMA bool "K8 NUMA support" select NUMA diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt new file mode 100644 index 0000000..587328b --- /dev/null +++ b/kernel/Kconfig.preempt @@ -0,0 +1,24 @@ + +config PREEMPT + bool "Preemptible Kernel" + help + This option reduces the latency of the kernel when reacting to + real-time or interactive events by allowing a low priority process to + be preempted even if it is in kernel mode executing a system call. + This allows applications to run more reliably even when the system is + under load. + + Say Y here if you are building a kernel for a desktop, embedded + or real-time system. Say N if you are unsure. + +config PREEMPT_BKL + bool "Preempt The Big Kernel Lock" + depends on PREEMPT + default y + help + This option reduces the latency of the kernel by making the + big kernel lock preemptible. + + Say Y here if you are building a kernel for a desktop system. + Say N if you are unsure. + |