this post was submitted on 03 Nov 2025
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Linux 6.19 To Optimize Exiting To User-Space For Restartable Sequences (www.phoronix.com)
submitted 23 hours ago by cm0002@lemmy.zip to c/linux@programming.dev
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Queued up in a TIP branch ahead of the Linux 6.19 merge window opening in about one month's time is optimizing the Restartable Sequences "RSEQ" code for its exit to user-space code path.

Intel Fellow Thomas Gleixner of Linutronix worked on a set of patches recently for optimizing the exit to user-space path for Restartable Sequences, the functionality for efficient access and manipulation of per-CPU data structures by user-space.

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[–] frongt@lemmy.zip 4 points 18 hours ago

The last line in the summary in the post should be accessible. It just optimizes managing data in the kernel from user space (i.e. not using privileged kernel access).