Subj : [$] Per-CPU memory for user space
To   : All
From : LWN.net
Date : Tue Apr 08 2025 14:45:08

[$] Per-CPU memory for user space

Date:
Tue, 08 Apr 2025 13:37:07 +0000

Description:
The kernel makes extensive use of per-CPU data as a way to avoid contention
between processors and improve scalability.  Using the same technique in
user space is harder, though, since there is little control over which CPU
a process may be running on at any given time.  That hasn't stopped Mathieu
Desnoyers from trying, though; in the memory-management track of the 2025
Linux Storage, Filesystem, Memory-Management, and BPF Summit, he presented
a proposal for how user-space per-CPU memory could work.

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Link to news story:
https://lwn.net/Articles/1016408/


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