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.
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| 1 | + | |
| 2 | +config PREEMPT | |
| 3 | + bool "Preemptible Kernel" | |
| 4 | + help | |
| 5 | + This option reduces the latency of the kernel when reacting to | |
| 6 | + real-time or interactive events by allowing a low priority process to | |
| 7 | + be preempted even if it is in kernel mode executing a system call. | |
| 8 | + This allows applications to run more reliably even when the system is | |
| 9 | + under load. | |
| 10 | + | |
| 11 | + Say Y here if you are building a kernel for a desktop, embedded | |
| 12 | + or real-time system. Say N if you are unsure. | |
| 13 | + | |
| 14 | +config PREEMPT_BKL | |
| 15 | + bool "Preempt The Big Kernel Lock" | |
| 16 | + depends on PREEMPT | |
| 17 | + default y | |
| 18 | + help | |
| 19 | + This option reduces the latency of the kernel by making the | |
| 20 | + big kernel lock preemptible. | |
| 21 | + | |
| 22 | + Say Y here if you are building a kernel for a desktop system. | |
| 23 | + Say N if you are unsure. | |
| 24 | + | |