| Kconfig.preempt (e5451c8f8330e03ad3cfa16048b4daf961af434f) | Kconfig.preempt (87a4c375995ed8eaa721b08825cf73d0b02b3145) |
|---|---|
| 1 2choice 3 prompt "Preemption Model" 4 default PREEMPT_NONE 5 6config PREEMPT_NONE 7 bool "No Forced Preemption (Server)" 8 help --- 4 unchanged lines hidden (view full) --- 13 14 Select this option if you are building a kernel for a server or 15 scientific/computation system, or if you want to maximize the 16 raw processing power of the kernel, irrespective of scheduling 17 latencies. 18 19config PREEMPT_VOLUNTARY 20 bool "Voluntary Kernel Preemption (Desktop)" | 1 2choice 3 prompt "Preemption Model" 4 default PREEMPT_NONE 5 6config PREEMPT_NONE 7 bool "No Forced Preemption (Server)" 8 help --- 4 unchanged lines hidden (view full) --- 13 14 Select this option if you are building a kernel for a server or 15 scientific/computation system, or if you want to maximize the 16 raw processing power of the kernel, irrespective of scheduling 17 latencies. 18 19config PREEMPT_VOLUNTARY 20 bool "Voluntary Kernel Preemption (Desktop)" |
| 21 depends on !ARCH_NO_PREEMPT |
|
| 21 help 22 This option reduces the latency of the kernel by adding more 23 "explicit preemption points" to the kernel code. These new 24 preemption points have been selected to reduce the maximum 25 latency of rescheduling, providing faster application reactions, 26 at the cost of slightly lower throughput. 27 28 This allows reaction to interactive events by allowing a 29 low priority process to voluntarily preempt itself even if it 30 is in kernel mode executing a system call. This allows 31 applications to run more 'smoothly' even when the system is 32 under load. 33 34 Select this if you are building a kernel for a desktop system. 35 36config PREEMPT 37 bool "Preemptible Kernel (Low-Latency Desktop)" | 22 help 23 This option reduces the latency of the kernel by adding more 24 "explicit preemption points" to the kernel code. These new 25 preemption points have been selected to reduce the maximum 26 latency of rescheduling, providing faster application reactions, 27 at the cost of slightly lower throughput. 28 29 This allows reaction to interactive events by allowing a 30 low priority process to voluntarily preempt itself even if it 31 is in kernel mode executing a system call. This allows 32 applications to run more 'smoothly' even when the system is 33 under load. 34 35 Select this if you are building a kernel for a desktop system. 36 37config PREEMPT 38 bool "Preemptible Kernel (Low-Latency Desktop)" |
| 39 depends on !ARCH_NO_PREEMPT |
|
| 38 select PREEMPT_COUNT 39 select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK 40 help 41 This option reduces the latency of the kernel by making 42 all kernel code (that is not executing in a critical section) 43 preemptible. This allows reaction to interactive events by 44 permitting a low priority process to be preempted involuntarily 45 even if it is in kernel mode executing a system call and would --- 13 unchanged lines hidden --- | 40 select PREEMPT_COUNT 41 select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK 42 help 43 This option reduces the latency of the kernel by making 44 all kernel code (that is not executing in a critical section) 45 preemptible. This allows reaction to interactive events by 46 permitting a low priority process to be preempted involuntarily 47 even if it is in kernel mode executing a system call and would --- 13 unchanged lines hidden --- |