[$] The trouble with the new uretprobes

A "uretprobe" is a dynamic, user-space tracepoint injected by the kernelinto a running process; this documenttersely describes their use. Among other things, uretprobes are used bythe perf utility to time function calls. The 6.11 kernel saw asignificant change to uretprobes that improved their performance, but thatchange is also creating trouble for some users. The best way to solve theproblem is not entirely clear.