openzfs/zfs

arc_summary to be able to show only altered tunables,spl

Open

#11,685 创建于 2021年3月3日

在 GitHub 查看
 (2 评论) (0 反应) (0 负责人)C (9,908 star) (1,703 fork)batch import
Type: Featuregood first issue

描述

Describe the feature would like to see added to OpenZFS

arc_summary -s tunables/spl currently shows all values I wish I was able to quickly see only the modified values. By passing a new supplementary argument, arc_summary would omit showing tunables that are left at their default values

How will this feature improve OpenZFS?

Easier and faster identification of alterations in arc_summary tunables section output

Additional context

to help arc_summary automate obtaining default values instead of hardcoding them, modinfo -p for zfs,spl,icp and zcommon should also display default values, not just the description, in a parsable form (an identifiable pattern to extract the default value)

贡献者指南

技术栈
cpython
领域
cliperformance
议题类型
feature
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
3
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
1-3 hours
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
Python knowledgeUnderstanding of arc summaryFamiliarity with ZFS tunables
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
30
研究方向
The issue requests a new flag for arc summary to show only non default tunables. A maintainer suggested using modinfo p to get defaults (see issue #11686). The implementation should modify the arc summary Python script to compare current values with defaults. Key files to review: cmd/arc summary. The script currently lists all tunables; adding logic to filter by default values requires parsing modinfo output or hardcoding defaults. The linked issue #11686 proposes enhancing modinfo to include defaults. Focus on implementing the flag and integrating with modinfo.