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Home PageAlibaba Cloud LinuxUser GuideKernel features

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Kernel features

Updated at: 2024-12-12 07:29

Overview of kernel features and interfaces
System configuration optimization
Change the kernel version
Change the kernel preemption mode
SCHED_IDLE feature of cgroups
Use memory isolation for OOT drivers
Enhanced read-only file system (EROFS) user guide
Use the kdumpctl tool to view the boot logs for kernel crash dumps
Use the Memory Access Optimization with Kdump Enabled feature on an Arm64 architecture
Configure the crashkernel parameter
Use the latency statistics feature of memsli and sched_sli
Troubleshoot the task scheduling latency issue of the ksoftirqd thread
Optimize the operation of reading the /proc/cpuinfo file to obtain the CPU frequency
Configure the amount of memory reserved for the page cache
Fine-tune the system dirty page thresholds and writeback control
How to fine-tune the dirty page threshold and writeback configuration of file systems
Call the drop_caches interface to clear the page cache
Memcg Exstat feature
Memcg global minimum watermark rating
Memcg QoS feature of the cgroup v1 interface
Memcg backend asynchronous reclaim
Memcg OOM priority policy
THP reclaim
TCP-RT configurations
Change the TCP TIME-WAIT timeout period
Enable the cgroup writeback feature
Configure the blk-iocost weight-based throttling feature
Enhance the monitoring of block I/O throttling
Use the JBD2 optimization interface
Track I/O latency
Create hard links across project quotas
Detect I/O hangs of file systems and block layers
Configure the context readahead feature of file systems to improve file access performance
Configure tcm_loop device parameters
Optimizations for the copy operations of TCMU
Security hardening for user namespaces in Alibaba Cloud Linux
Enable the PSI feature for cgroup v1
Enable the CPU burst feature for cgroup v1
Group identity feature
Statistical state change of anonymous pages in the /proc/meminfo file
Enhance the visibility of container resources
Shared Memory Communication (SMC)
UKFEF
Huge Pages
Use KFENCE to detect kernel memory pollution
Page Cache Limit feature
Disable the estimation feature of IPVS to prevent network jitters
Code duptext feature
Use VTOA

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