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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Noah Misch <noah@leadboat.com>
Cc: Andrey Borodin <x4mmm@yandex-team.ru>
Cc: PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: Peter Geoghegan <pg@bowt.ie>
Cc: Andres Freund <andres@anarazel.de>
Subject: Re: conchuela timeouts since 2021-10-09 system upgrade
Date: Thu, 28 Oct 2021 23:19:56 -0400
Message-ID: <581193.1635477596@sss.pgh.pa.us> (raw)
In-Reply-To: <20211029025600.GB298507@rfd.leadboat.com>
References: <20210920044143.GA3414844@rfd.leadboat.com>
	<593C6C66-F19E-412A-9896-F1F5B272424A@yandex-team.ru>
	<20210925201012.GC4134968@rfd.leadboat.com>
	<20211017151205.GA2384251@rfd.leadboat.com>
	<9BA43784-E4A7-4638-900C-FC9868C388FA@yandex-team.ru>
	<20211019030212.GB3403374@rfd.leadboat.com>
	<20211024050028.GA3310519@rfd.leadboat.com>
	<64835CF9-D9AA-49BF-A685-01C23B1023C1@yandex-team.ru>
	<20211024161942.GB3945842@rfd.leadboat.com>
	<640FA6DC-A998-4499-B3B4-2773685B8C56@yandex-team.ru>
	<20211029025600.GB298507@rfd.leadboat.com>

Noah Misch <noah@leadboat.com> writes:
> Did that work?  Commit 7f580aa should make this unnecessary for v12+
> contrib/amcheck tests, but older branches still need a fix, and 017_shm.pl
> needs a fix in all branches.  A backup plan is just to skip affected tests on
> dragonfly 6+.  Since the breakage has been limited to so few tests, I'm
> optimistic that a better workaround will present itself.

It indeed is looking like 7f580aa made the problem go away on conchuela,
but do we understand why?  The only theory I can think of is "kernel bug",
but while that's plausible for prairiedog it seems hard to credit for a
late-model BSD kernel.

			regards, tom lane





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