[$] Improving pseudo filesystems

Date:
Wed, 10 Jul 2024 15:33:35 +0000

Description:
The eventfs filesystem provides an interface to the tracepoints that are available
to be used by various Linux tracing tools (e.g. ftrace, perf, uprobes,
etc.); it is meant to be a version of the tracefs filesystem that
dynamically allocates its entries as needed. The goal is to reduce the memory required for multiple instances of tracefs, as Steven Rostedt described in
a session at the 2022 Linux Storage,
Filesystem, Memory Management, and BPF Summit . He returned to the 2024 edition of the summit to talk further about how to make pseudo (or virtual) filesystems, such as tracefs/eventfs, more like regular Linux filesystems, where the directory entries (dentries) and inodes are only created (and
cached) as needed.

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Link to news story:
https://lwn.net/Articles/981155/


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