Re: kevent latch paths don't handle postmaster death well - Mailing list pgsql-hackers

From Tom Lane
Subject Re: kevent latch paths don't handle postmaster death well
Date
Msg-id 3896447.1602798051@sss.pgh.pa.us
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In response to Re: kevent latch paths don't handle postmaster death well  (Thomas Munro <thomas.munro@gmail.com>)
List pgsql-hackers
Thomas Munro <thomas.munro@gmail.com> writes:
> I couldn't resist digging further into the Apple sources to figure out
> what was going on there, and I realised that the code path I was
> looking at can only report EACCES if you asked for NOTE_EXITSTATUS,
> which appears to be an Apple extension to the original FreeBSD kqueue
> system designed to let you receive the exit status of the monitored
> process.  That is indeed much more privileged information, and it's
> only allowed for your own children.

Ah.

> So it's possible that commit
> 70516a17 was a waste of electrons, but I don't think it can hurt;

Yeah, I'm not inclined to revert it.  If we did get that errno,
it'd be hard to interpret it in any way that didn't involve the
postmaster being gone.

            regards, tom lane



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