Subj : [$] A look at what's possible with BPF arenas
To   : All
From : LWN.net
Date : Tue May 13 2025 22:00:08

[$] A look at what's possible with BPF arenas

Date:
Tue, 13 May 2025 20:44:18 +0000

Description:
BPF arenas are areas of memory where the verifier can safely relax its 
checking of
pointers, allowing programmers to write arbitrary data structures in BPF. Emil
Tsalapatis reported on how his team has used arenas in writing sched_ext 
schedulers at the 2025 Linux Storage, Filesystem,
Memory-Management, and BPF Summit. His biggest complaint was about the fact 
that
kernel pointers can't be stored in BPF arenas  something that the BPF
developers hope to address, although there are some implementation problems 
that
must be sorted out first.

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Link to news story:
https://lwn.net/Articles/1019885/


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