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Diffstat (limited to 'linux-2.6-xen-sparse/kernel/Kconfig.preempt')
| -rw-r--r-- | linux-2.6-xen-sparse/kernel/Kconfig.preempt | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/linux-2.6-xen-sparse/kernel/Kconfig.preempt b/linux-2.6-xen-sparse/kernel/Kconfig.preempt deleted file mode 100644 index 17ab322322..0000000000 --- a/linux-2.6-xen-sparse/kernel/Kconfig.preempt +++ /dev/null @@ -1,66 +0,0 @@ - -choice - prompt "Preemption Model" - default PREEMPT_NONE - -config PREEMPT_NONE - bool "No Forced Preemption (Server)" - help - This is the traditional Linux preemption model, geared towards - throughput. It will still provide good latencies most of the - time, but there are no guarantees and occasional longer delays - are possible. - - Select this option if you are building a kernel for a server or - scientific/computation system, or if you want to maximize the - raw processing power of the kernel, irrespective of scheduling - latencies. - -config PREEMPT_VOLUNTARY - bool "Voluntary Kernel Preemption (Desktop)" - help - This option reduces the latency of the kernel by adding more - "explicit preemption points" to the kernel code. These new - preemption points have been selected to reduce the maximum - latency of rescheduling, providing faster application reactions, - at the cost of slighly lower throughput. - - This allows reaction to interactive events by allowing a - low priority process to voluntarily preempt itself even if it - is in kernel mode executing a system call. This allows - applications to run more 'smoothly' even when the system is - under load. - - Select this if you are building a kernel for a desktop system. - -config PREEMPT - bool "Preemptible Kernel (Low-Latency Desktop)" - depends on !XEN - help - This option reduces the latency of the kernel by making - all kernel code (that is not executing in a critical section) - preemptible. This allows reaction to interactive events by - permitting a low priority process to be preempted involuntarily - even if it is in kernel mode executing a system call and would - otherwise not be about to reach a natural preemption point. - This allows applications to run more 'smoothly' even when the - system is under load, at the cost of slighly lower throughput - and a slight runtime overhead to kernel code. - - Select this if you are building a kernel for a desktop or - embedded system with latency requirements in the milliseconds - range. - -endchoice - -config PREEMPT_BKL - bool "Preempt The Big Kernel Lock" - depends on SMP || 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. - |