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SubjectRestartable Sequences system call merged into Linux

Good news! The restartable sequences (rseq) system call is now merged into the master
branch of the Linux kernel within the 4.18 merge window:

It would be important to discuss how we should proceed to integrate the library part
of rseq (see tools/testing/selftests/rseq/rseq*.{ch}) into glibc, or if it should
live in a standalone project.

It should be noted that there can be only one rseq TLS area registered per thread,
which can then be used by many libraries and by the executable, so this is a
process-wide (per-thread) resource that we need to manage carefully.

Thoughts ?



Mathieu Desnoyers
EfficiOS Inc.

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