0111 _I|Mjq؂File not found. #l4( (  fD- _0$# SPDX-License-Identifier: GPL-2.0-only # # RCU-related configuration options # menu "RCU Subsystem" config TREE_RCU bool default y if SMP # Dynticks-idle tracking select CONTEXT_TRACKING_IDLE help This option selects the RCU implementation that is designed for very large SMP system with hundreds or thousands of CPUs. It also scales down nicely to smaller systems. config PREEMPT_RCU bool default y if PREEMPTION select TREE_RCU help This option selects the RCU implementation that is designed for very large SMP systems with hundreds or thousands of CPUs, but for which real-time response is also required. It also scales down nicely to smaller systems. Select this option if you are unsure. config TINY_RCU bool default y if !PREEMPT_RCU && !SMP help This option selects the RCU implementation that is designed for UP systems from which real-time response is not required. This option greatly reduces the memory footprint of RCU. config RCU_EXPERT bool "Make expert-level adjustments to RCU configuration" default n help This option needs to be enabled if you wish to make expert-level adjustments to RCU configuration. By default, no such adjustments can be made, which has the often-beneficial side-effect of preventing "make oldconfig" from asking you all sorts of detailed questions about how you would like numerous obscure RCU options to be set up. Say Y if you need to make expert-level adjustments to RCU. Say N if you are unsure. config TINY_SRCU bool default y if TINY_RCU help This option selects the single-CPU non-preemptible version of SRCU. config TREE_SRCU bool default y if !TINY_RCU help This option selects the full-fledged version of SRCU. config NEED_SRCU_NMI_SAFE def_bool HAVE_NMI && !ARCH_HAS_NMI_SAFE_THIS_CPU_OPS && !TINY_SRCU config TASKS_RCU_GENERIC def_bool TASKS_RCU || TASKS_RUDE_RCU || TASKS_TRACE_RCU help This option enables generic infrastructure code supporting task-based RCU implementations. Not for manual selection. config FORCE_TASKS_RCU bool "Force selection of TASKS_RCU" depends on RCU_EXPERT select TASKS_RCU default n help This option force-enables a task-based RCU implementation that uses only voluntary context switch (not preemption!), idle, and user-mode execution as quiescent states. Not for manual selection in most cases. config NEED_TASKS_RCU bool default n config TASKS_RCU bool default NEED_TASKS_RCU && (PREEMPTION || PREEMPT_AUTO) select IRQ_WORK config FORCE_TASKS_RUDE_RCU bool "Force selection of Tasks Rude RCU" depends on RCU_EXPERT select TASKS_RUDE_RCU default n help This option force-enables a task-based RCU implementation that uses only context switch (including preemption) and user-mode execution as quiescent states. It forces IPIs and context switches on all online CPUs, including idle ones, so use with caution. Not for manual selection in most cases. config TASKS_RUDE_RCU bool default n select IRQ_WORK config FORCE_TASKS_TRACE_RCU bool "Force selection of Tasks Trace RCU" depends on RCU_EXPERT select TASKS_TRACE_RCU default n help This option enables a task-based RCU implementation that uses explicit rcu_read_lock_trace() read-side markers, and allows these readers to appear in the idle loop as well as on the CPU hotplug code paths. It can force IPIs on online CPUs, including idle ones, so use with caution. Not for manual selection in most cases. config TASKS_TRACE_RCU bool default n select IRQ_WORK config RCU_STALL_COMMON def_bool TREE_RCU help This option enables RCU CPU stall code that is common between the TINY and TREE variants of RCU. The purpose is to allow the tiny variants to disable RCU CPU stall warnings, while making these warnings mandatory for the tree variants. config RCU_NEED_SEGCBLIST def_bool ( TREE_RCU || TREE_SRCU || TASKS_RCU_GENERIC ) conf