我用来make menuconfig设置内核（5.2.3）。当我保存配置时，文件仅包含一些注释，没有任何选项。无论我是否保存到.config、等something.config，都会发生这种情况/tmp/something.config。保存后，我可以浏览菜单，并且仍然可以看到我的选项设置正确。
我以前从未遇到过 menuconfig 的问题（自 2.4 时代以来）。我在 SystemRescueCd 6.0.3、btrfs 上以 root 身份运行menuconfig，可用分区上显然有可用空间。
这是保存的配置文件：
#
# Automatically generated file; DO NOT EDIT.
# Linux/x86 5.2.3 Kernel Configuration
#
#
# Compiler: gcc (Gentoo 8.3.0-r1 p1.1) 8.3.0
#
#
# General setup
#
#
# IRQ subsystem
#
# end of IRQ subsystem
#
# Timers subsystem
#
# end of Timers subsystem
#
# CPU/Task time and stats accounting
#
# end of CPU/Task time and stats accounting
#
# RCU Subsystem
#
# end of RCU Subsystem
#
# Kernel Performance Events And Counters
#
# end of Kernel Performance Events And Counters
# end of General setup
#
# Processor type and features
#
#
# Performance monitoring
#
# end of Performance monitoring
# end of Processor type and features
#
# Power management and ACPI options
#
#
# CPU Frequency scaling
#
#
# CPU frequency scaling drivers
#
#
# shared options
#
# end of CPU Frequency scaling
#
# CPU Idle
#
# end of CPU Idle
# end of Power management and ACPI options
#
# Bus options (PCI etc.)
#
# end of Bus options (PCI etc.)
#
# Binary Emulations
#
# end of Binary Emulations
#
# Firmware Drivers
#
#
# EFI (Extensible Firmware Interface) Support
#
# end of EFI (Extensible Firmware Interface) Support
#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers
#
# General architecture-dependent options
#
#
# GCOV-based kernel profiling
#
# end of GCOV-based kernel profiling
#
# GCC plugins
#
# end of GCC plugins
# end of General architecture-dependent options
#
# Partition Types
#
# end of Partition Types
#
# IO Schedulers
#
# end of IO Schedulers
#
# Executable file formats
#
# end of Executable file formats
#
# Memory Management options
#
# end of Memory Management options
#
# Networking options
#
#
# Core Netfilter Configuration
#
#
# Xtables combined modules
#
#
# Xtables targets
#
#
# Xtables matches
#
# end of Core Netfilter Configuration
#
# IP: Netfilter Configuration
#
# end of IP: Netfilter Configuration
#
# IPv6: Netfilter Configuration
#
# end of IPv6: Netfilter Configuration
#
# DCCP CCIDs Configuration
#
# end of DCCP CCIDs Configuration
#
# DCCP Kernel Hacking
#
# end of DCCP Kernel Hacking
#
# Queueing/Scheduling
#
#
# Classification
#
#
# Network testing
#
# end of Network testing
# end of Networking options
#
# Packet Radio protocols
#
#
# AX.25 network device drivers
#
# end of AX.25 network device drivers
#
# CAN Device Drivers
#
#
# CAN USB interfaces
#
# end of CAN USB interfaces
# end of CAN Device Drivers
#
# Bluetooth device drivers
#
# end of Bluetooth device drivers
#
# Device Drivers
#
#
# PCI controller drivers
#
#
# Cadence PCIe controllers support
#
# end of Cadence PCIe controllers support
#
# DesignWare PCI Core Support
#
# end of DesignWare PCI Core Support
# end of PCI controller drivers
#
# PCI Endpoint
#
# end of PCI Endpoint
#
# PCI switch controller drivers
#
# end of PCI switch controller drivers
#
# PC-card bridges
#
#
# Generic Driver Options
#
#
# Firmware loader
#
# end of Firmware loader
# end of Generic Driver Options
#
# Bus devices
#
# end of Bus devices
#
# Partition parsers
#
# end of Partition parsers
#
# User Modules And Translation Layers
#
#
# RAM/ROM/Flash chip drivers
#
# end of RAM/ROM/Flash chip drivers
#
# Mapping drivers for chip access
#
# end of Mapping drivers for chip access
#
# Self-contained MTD device drivers
#
#
# Disk-On-Chip Device Drivers
#
# end of Self-contained MTD device drivers
#
# LPDDR & LPDDR2 PCM memory drivers
#
# end of LPDDR & LPDDR2 PCM memory drivers
#
# Protocols
#
#
# NVME Support
#
# end of NVME Support
#
# Misc devices
#
#
# EEPROM support
#
# end of EEPROM support
#
# Texas Instruments shared transport line discipline
#
# end of Texas Instruments shared transport line discipline
#
# Intel MIC & related support
#
#
# Intel MIC Bus Driver
#
#
# SCIF Bus Driver
#
#
# VOP Bus Driver
#
#
# Intel MIC Host Driver
#
#
# Intel MIC Card Driver
#
#
# SCIF Driver
#
#
# Intel MIC Coprocessor State Management (COSM) Drivers
#
#
# VOP Driver
#
# end of Intel MIC & related support
# end of Misc devices
#
# SCSI device support
#
#
# SCSI support type (disk, tape, CD-ROM)
#
#
# SCSI Transports
#
# end of SCSI Transports
# end of SCSI device support
#
# Controllers with non-SFF native interface
#
#
# SFF controllers with custom DMA interface
#
#
# SATA SFF controllers with BMDMA
#
#
# PATA SFF controllers with BMDMA
#
#
# PIO-only SFF controllers
#
#
# Generic fallback / legacy drivers
#
#
# IEEE 1394 (FireWire) support
#
# end of IEEE 1394 (FireWire) support
#
# CAIF transport drivers
#
#
# Distributed Switch Architecture drivers
#
# end of Distributed Switch Architecture drivers
#
# MII PHY device drivers
#
#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
#
# Input device support
#
#
# Userland interfaces
#
#
# Input Device Drivers
#
#
# Hardware I/O ports
#
# end of Hardware I/O ports
# end of Input device support
#
# Character devices
#
#
# Serial drivers
#
#
# Non-8250 serial port support
#
# end of Serial drivers
#
# PCMCIA character devices
#
# end of PCMCIA character devices
# end of Character devices
#
# I2C support
#
#
# I2C Hardware Bus support
#
#
# PC SMBus host controller drivers
#
#
# ACPI drivers
#
#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
#
# External I2C/SMBus adapter drivers
#
#
# Other I2C/SMBus bus drivers
#
# end of I2C Hardware Bus support
# end of I2C support
#
# PPS clients support
#
#
# PPS generators support
#
#
# PTP clock support
#
#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# end of PTP clock support
#
# Native drivers
#
#
# ACPI drivers
#
#
# Intel thermal drivers
#
#
# ACPI INT340X thermal drivers
#
# end of ACPI INT340X thermal drivers
# end of Intel thermal drivers
#
# Watchdog Pretimeout Governors
#
#
# Watchdog Device Drivers
#
#
# PCI-based Watchdog Cards
#
#
# USB-based Watchdog Cards
#
#
# Multifunction device drivers
#
# end of Multifunction device drivers
#
# Multimedia core support
#
#
# Media drivers
#
#
# Supported MMC/SDIO adapters
#
#
# Media ancillary drivers (tuners, sensors, i2c, spi, frontends)
#
#
# Customise DVB Frontends
#
#
# Tools to develop new frontends
#
# end of Customise DVB Frontends
#
# Graphics support
#
#
# I2C encoder or helper chips
#
# end of I2C encoder or helper chips
#
# ARM devices
#
# end of ARM devices
#
# ACP (Audio CoProcessor) Configuration
#
# end of ACP (Audio CoProcessor) Configuration
#
# drm/i915 Debugging
#
# end of drm/i915 Debugging
#
# Display Panels
#
# end of Display Panels
#
# Display Interface Bridges
#
# end of Display Interface Bridges
#
# Frame buffer Devices
#
#
# Frame buffer hardware drivers
#
# end of Frame buffer Devices
#
# Backlight & LCD device support
#
# end of Backlight & LCD device support
#
# Console display driver support
#
# end of Console display driver support
# end of Graphics support
#
# HD-Audio
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
#
# Set to Y if you want auto-loading the codec driver
#
# end of HD-Audio
#
# HID support
#
#
# Special HID drivers
#
# end of Special HID drivers
#
# USB HID support
#
# end of USB HID support
#
# I2C HID support
#
# end of I2C HID support
#
# Intel ISH HID support
#
# end of Intel ISH HID support
# end of HID support
#
# Miscellaneous USB options
#
#
# USB Host Controller Drivers
#
#
# USB Device Class drivers
#
#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#
#
# also be needed; see USB_STORAGE Help for more info
#
#
# USB Imaging devices
#
#
# USB port drivers
#
#
# USB Miscellaneous drivers
#
#
# USB Physical Layer drivers
#
# end of USB Physical Layer drivers
#
# MMC/SD/SDIO Host Controller Drivers
#
#
# LED drivers
#
#
# LED driver for blink(1) USB RGB LED is under Special HID drivers (HID_THINGM)
#
#
# LED Triggers
#
#
# iptables trigger is under Netfilter config (LED target)
#
#
# RTC interfaces
#
#
# I2C RTC drivers
#
#
# SPI RTC drivers
#
#
# SPI and I2C RTC drivers
#
#
# Platform RTC drivers
#
#
# on-CPU RTC drivers
#
#
# HID Sensor RTC drivers
#
#
# DMA Devices
#
#
# DMA Clients
#
#
# DMABUF options
#
# end of DMABUF options
#
# Microsoft Hyper-V guest support
#
# end of Microsoft Hyper-V guest support
#
# Speakup console speech
#
# end of Speakup console speech
#
# Android
#
# end of Android
#
# Gasket devices
#
# end of Gasket devices
#
# Common Clock Framework
#
# end of Common Clock Framework
#
# Clock Source drivers
#
# end of Clock Source drivers
#
# Generic IOMMU Pagetable Support
#
# end of Generic IOMMU Pagetable Support
#
# Remoteproc drivers
#
# end of Remoteproc drivers
#
# Rpmsg drivers
#
# end of Rpmsg drivers
#
# SOC (System On Chip) specific Drivers
#
#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers
#
# Aspeed SoC drivers
#
# end of Aspeed SoC drivers
#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers
#
# NXP/Freescale QorIQ SoC drivers
#
# end of NXP/Freescale QorIQ SoC drivers
#
# i.MX SoC drivers
#
# end of i.MX SoC drivers
#
# IXP4xx SoC drivers
#
# end of IXP4xx SoC drivers
#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers
#
# Xilinx SoC drivers
#
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers
#
# IRQ chip support
#
# end of IRQ chip support
#
# PHY Subsystem
#
# end of PHY Subsystem
#
# Performance monitor support
#
# end of Performance monitor support
#
# Android
#
# end of Android
#
# HW tracing support
#
# end of HW tracing support
# end of Device Drivers
#
# File systems
#
#
# Caches
#
# end of Caches
#
# CD-ROM/DVD Filesystems
#
# end of CD-ROM/DVD Filesystems
#
# DOS/FAT/NT Filesystems
#
# end of DOS/FAT/NT Filesystems
#
# Pseudo filesystems
#
# end of Pseudo filesystems
# end of File systems
#
# Security options
#
#
# Kernel hardening options
#
#
# Memory initialization
#
# end of Memory initialization
# end of Kernel hardening options
# end of Security options
#
# Crypto core or helper
#
#
# Public-key cryptography
#
#
# Authenticated Encryption with Associated Data
#
#
# Block modes
#
#
# Hash modes
#
#
# Digest
#
#
# Ciphers
#
#
# Compression
#
#
# Random Number Generation
#
#
# Certificates for signature checking
#
# end of Certificates for signature checking
#
# Library routines
#
# end of Library routines
#
# Kernel hacking
#
#
# printk and dmesg options
#
# end of printk and dmesg options
#
# Compile-time checks and compiler options
#
# end of Compile-time checks and compiler options
#
# Memory Debugging
#
# end of Memory Debugging
#
# Debug Lockups and Hangs
#
# end of Debug Lockups and Hangs
#
# Lock Debugging (spinlocks, mutexes, etc...)
#
# end of Lock Debugging (spinlocks, mutexes, etc...)
#
# RCU Debugging
#
# end of RCU Debugging
# end of Kernel hacking