Gentoo/Linux Configuration Common
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From Alon Bar-Lev's Site
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Alonbl's base kernel configuration
Following is basic kernel configuration I use for all my computer.
I try to make the kernel configuration as smaller as I can, trying to make sure I understand why I add an feature.
I also try to use modules as much as I can to see dependency and be able to see references.
Kernel
Linux Kernel Configuration: |
General setup ---> [*] Prompt for development and/or incomplete code/drivers [*] Support for paging of anonymous memory (swap) [*] Initial RAM filesystem and RAM disk (initramfs/initrd) support [*] System V IPC ### apache -*- Export task/process statistics through netlink (EXPERIMENTAL) ### iotop -*- Enable per-task delay accounting (EXPERIMENTAL) ### iotop [*] Enable extended accounting over taskstats (EXPERIMENTAL) ### iotop [*] Enable per-task storage I/O accounting (EXPERIMENTAL) ### iotop [*] Enable loadable module support ---> [*] Module unloading [*] Module versioning support -*- Enable the block layer ---> [*] Block layer SG support v4 [*] Enable loadable module support ---> [*] Module unloading [*] Module versioning support IO Schedulers ---> <M> CFQ I/O scheduler [*] CFQ Group Scheduling support Default I/O scheduler (No-op) ---> Processor type and features ---> [*] Tickless System (Dynamic Ticks) [*] High Resolution Timer Support ### Workstation [*] Symmetric multi-processing support [*] Single-depth WCHAN output (2) Maximum number of CPUs ### Update to match machine [*] Multi-core scheduler support [*] Machine Check / overheating reporting [*] Intel MCE features [*] Sparse Memory virtual memmap Power management and ACPI options ---> [*] ACPI (Advanced Configuration and Power Interface) Support ---> -*- Button CPU Frequency scaling ---> [*] CPU Frequency scaling <M> CPU frequency translation statistics [*] CPU frequency translation statistics details Default CPUFreq governor (performance) ---> x86 CPU frequency scaling drivers ---> <M> ACPI Processor P-States drivers -*- CPU idle PM support [*] Cpuidle Driver for Intel Processors Bus options (PCI etc.) ---> [*] PCI support [*] Support mmconfig PCI config space access [*] PCI Express support [*] Message Signaled Interrupts (MSI and MSI-X) [*] Interrupts on hypertransport devices Executable file formats / Emulations ---> [*] Kernel support for ELF binaries [*] Networking support ---> Networking options ---> <M> Packet socket <M> Unix domain sockets [*] TCP/IP networking [*] IP: TCP syncookie support <M> Large Receive Offload (ipv4/tcp) <M> INET: socket monitoring interface [*] TCP: advanced congestion control ---> <*> CUBIC TCP Default TCP congestion control (Cubic) ---> [*] Security Marking Device Drivers ---> Generic Driver Options ---> [*] Select only drivers that don't need compile-time external firmware [*] Prevent firmware from being built -*- Userspace firmware loading support <*> Connector - unified userspace <-> kernelspace linker ---> [*] Report process events to userspace Input device support ---> <M> Event interface [*] Miscellaneous devices ---> -*- Keyboards ---> [*] Mice ---> <M> PS/2 mouse [*] Miscellaneous devices ---> <M> PC Speaker support Character devices ---> [*] HPET - High Precision Event Timer [*] Allow mmap of HPET [*] USB support ---> <M> Support for Host-side USB [*] USB runtime power management (autosuspend) and wakeup <M> USB Monitoring <M> EHCI HCD (USB 2.0) support <M> OHCI HCD support <M> UHCI HCD (most Intel and VIA) support <M> USB Mass Storage support [*] Real Time Clock ---> [*] Set system time from RTC on startup and resume (rtc0) RTC used to set the system time [*] /sys/class/rtc/rtcN (sysfs) [*] /dev/rtcN (character devices) <M> PC-style 'CMOS' [*] DMA Engine support ---> <M> Intel I/OAT DMA support [*] Network: TCP receive copy offload [*] IOMMU Hardware Support ---> [*] Support for DMA Remapping Devices [*] Enable DMA Remapping Devices by default [*] Support for Interrupt Remapping (EXPERIMENTAL) File systems ---> <M> The Extended 4 (ext4) filesystem ### you may want to set as <*> to avoid complex initramfs [*] Use ext4 for ext2/ext3 file systems [*] Ext4 extended attributes [*] Ext4 POSIX Access Control Lists [*] Ext4 Security Labels [*] Inotify support for userspace Pseudo filesystems ---> [*] Tmpfs POSIX Access Control Lists -*- Tmpfs extended attributes Kernel hacking ---> [*] Kernel debugging ### powertop [*] Collect kernel timers statistics ### powertop [*] Tracers ---> ### powertop [*] Trace process context switches and events ### powertop [*] Write protect kernel read-only data structures |
Also apply Gentoo/Firewall_Using_Firehol kernel configuration.
OpenRC cgroup integration:
Linux Kernel Configuration: |
General setup ---> [*] Control Group support ---> [*] Freezer cgroup subsystem [*] Device controller for cgroups [*] Cpuset support [*] Simple CPU accounting cgroup subsystem [*] Group CPU scheduler ---> [*] Group scheduling for SCHED_OTHER [*] Group scheduling for SCHED_RR/FIFO <M> Block IO controller IO Schedulers ---> <M> CFQ I/O scheduler [*] CFQ Group Scheduling support |
File: /etc/conf.d/modules
modules="${modules} af-packet " modules="${modules} inet_lro ioatdma cfq-iosched "
File: /etc/local.d/iosched.start
#!/bin/sh find /sys/class/block/*/. -name scheduler | while read f; do echo cfq > "$f"; done exit 0
Maintainer
Authors
Originally written by: Alon Bar-Lev - 2011-11-25
Authors are people who have worked on this document and have made significant changes to its content. If you have edited this article and wish to add yourself to the authors list please read "Who are Authors".