"Luis Alberto Amigo Navarro" <lamigo@atc.unican.es> writes:
> As i know, it's only using semop, even with TAS_AND_SET defined, this is an
> extract from postmaster's process registry
The fact that there are some semops in the strace doesn't prove
anything. We do use semaphores when we have to block the current
process.
regards, tom lane