Gentoo Linux — >
Gentoo 选项
[*] Gentoo Linux support [*] Linux dynamic and persistent device naming (userspace devfs) support [*] Select options required by Portage features
Support for init systems, system and service managers —>
选择 OpenRC 或者 systemd
[*] OpenRC, runit and other script based systems and managers [ ] systemd
[*] 64-bit kernel
General setup —>
默认 /etc/issue 输出大概是这样
This is ${HOSTNAME}.(kugui/Gentoo) Linux x86_64 ${VERSION}-sirat其中
${HOSTNAME} 在 /etc/conf.d/hostname 中定义
${VERSION} 为 内核的版本号, 形式类似 4.9.16-gentoo
() Cross-compiler tool prefix [ ] Compile also drivers which will not load (-sirat) Local version - append to kernel release [*] Automatically append version information to the version string Kernel compression mode (Gzip) ---> ((kugui/Gentoo)) Default hostname [*] Support for paging of anonymous memory (swap) -*- System V IPC [*] POSIX Message Queues [*] Enable process_vm_readv/writev syscalls [] uselib syscall [*] Auditing support
IRQ subsystem —>
[ ] Expose hardware/virtual IRQ mapping via debugfs
Timers subsystem —>
Timer tick handling (Idle dynticks system (tickless idle)) ---> ( ) Periodic timer ticks (constant rate, no dynticks) 强制按照频率触发时钟中断 (X) Idle dynticks system (tickless idle) 空闲时间不产生不必要的时钟中断 ( ) Full dynticks system (tickless) 尽可能不产生中断(使用与单任务) [ ] Old Idle dynticks config [*] High Resolution Timer Support
CPU/Task time and stats accounting —>
Cputime accounting (Simple tick based cputime accounting) ---> [ ] Fine granularity task level IRQ time accounting [ ] BSD Process Accounting [*] Export task/process statistics through netlink [*] Enable per-task delay accounting [ ] Enable extended accounting over taskstats
RCU Subsystem —>
[ ] Make expert-level adjustments to RCU configuration < > Kernel .config support (18) Kernel log buffer size (16 => 64KB, 17 => 128KB) 内核日志缓冲区长度 (dmesg 的最大长度) (12) CPU kernel log buffer size contribution (13 => 8 KB, 17 => 128KB) (13) Temporary per-CPU NMI log buffer size (12 => 4KB, 13 => 8KB) [ ] Memory placement aware NUMA scheduler
-*- Control Group support —>
-*- Namespaces support —>
[ ] Automatic process group scheduling [ ] Enable deprecated sysfs features to support old userspace tools -*- Kernel->user space relay support (formerly relayfs) [*] Initial RAM filesystem and RAM disk (initramfs/initrd) support () Initramfs source file(s) [*] Support initial ramdisks compressed using gzip [ ] Support initial ramdisks compressed using bzip2 [ ] Support initial ramdisks compressed using LZMA [ ] Support initial ramdisks compressed using XZ [ ] Support initial ramdisks compressed using LZO [ ] Support initial ramdisks compressed using LZ4 Compiler optimization level (Optimize for performance) ---> [ ] Configure standard kernel features (expert users) ---- [ ] Enable bpf() system call [ ] Enable userfaultfd() system call [ ] Embedded system
Kernel Performance Events And Counters —>
[ ] Disable heap randomization Choose SLAB allocator (SLUB (Unqueued Allocator)) ---> [ ] SLAB freelist randomization [*] SLUB per cpu partial cache [ ] Profiling support [ ] Kprobes [*] Optimize very unlikely/likely branches [ ] Static key selftest [ ] GCC plugins ---- Stack Protector buffer overflow detection (Strong) --->
- Regular 需要 gcc-4.2 以上
- Strong 需要 gcc-4.9 以上
- -fstack-protector-all
[*] Use a virtually-mapped stack
GCOV-based kernel profiling —>
ntfs 不需要内核支持（emerge ntfs3g, 需要FUSE_FS）
File systems [*] FUSE Support
编译安装内核
make && make modules_install
make install