Re: injection_points: Switch wait/wakeup to use atomics rather than latches

On Wed, May 27, 2026 at 10:43 PM Michael Paquier  wrote:
> While looking at the test proposed on the thread about the ProcKill(),
> I have been reminded about the fact that relying on latches and a
> condition variable for the wait and the wakeups has its limits:
> https://www.postgresql.org/message-id/aheVjCHmcbXBtiy0%40paquier.xyz

After reading this email, the linked-to email, and the commit message
for the patch, I still don't have a clear understanding of what this
is intended to fix. It seems like it's going to make the
responsiveness worse. In general, we want to replace escalating wait
loops with things that wake up instantly at the right time, and this
is going in the opposite direction.

-- 
Robert Haas
EDB: http://www.enterprisedb.com