December 2006
Intermediate to advanced
202 pages
8h 29m
English
Content preview from Linux Kernel in a NutshellBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Name
PREEMPT — Preemptible kernel (low-latency desktop)
This option reduces the latency of the kernel by making all kernel code (except code 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 appear 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.
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