openzfs/zfs

ZFS needs a lazytime property to set lazytime mount option

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#9,843 创建于 2020年1月15日

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Type: Featuregood first issue

描述

System information

Type Version/Name
Distribution Name Arch Linux
Linux Kernel 5.4.10
Architecture x86_64
ZFS Version 0.8.2-1
SPL Version 0.8.2-1

ZFS supports lazytime, and datasets can be mounted with lazytime by running mount -o remount,lazytime tank/foo, but there is no property in the dataset to influence lazytime so that zfs mount tank/foo will set lazytime on.

贡献者指南

技术栈
c
领域
backendperformance
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。
3-5 days
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
ZFS property systemC programmingLinux mount options
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 adding a 'lazytime' property to ZFS datasets, similar to existing properties like 'atime'. Investigate how mount options are currently implemented as properties in ZFS, focusing on files such as 'module/zfs/zfs prop.c' and 'lib/libzfs/libzfs mount.c'. The existing support for 'lazytime' via manual remount indicates the kernel feature is available; the task is to expose it as a dataset property. Review the property definitions and mount code to understand how to add a new property that triggers the lazytime mount option during 'zfs mount'.