Post Syndicated from original https://lwn.net/Articles/883104/rss

“Restartable sequences” are small segments of user-space code designed to
access per-CPU data structures without the need for heavyweight locking.
It is a relatively obscure feature, despite having been supported by the
Linux kernel since the 4.18 release. Among other things, there is no
support in the GNU C Library (glibc) for this feature. That is about to
change with the upcoming glibc 2.35
release, though, so a look at the user-space API
for this feature is warranted.