HandleParallelMessages contains CHECK_FOR_INTERRUPTS?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-hackers(at)postgreSQL(dot)org
Subject: HandleParallelMessages contains CHECK_FOR_INTERRUPTS?
Date: 2016-08-01 18:08:56
Message-ID: 20071.1470074936@sss.pgh.pa.us
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$SUBJECT seems like a pretty bad idea, because it implies a recursive
entry to ProcessInterrupts and thence to HandleParallelMessages itself.
By what reasoning is that call necessary where it's placed?

regards, tom lane

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