Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mo6ex-0007kD-Hf for pgsql-bugs@arkaria.postgresql.org; Fri, 19 Nov 2021 16:22:43 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1mo6ew-0004ti-4z for pgsql-bugs@arkaria.postgresql.org; Fri, 19 Nov 2021 16:22:42 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mo6ev-0004tY-Sy for pgsql-bugs@lists.postgresql.org; Fri, 19 Nov 2021 16:22:41 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mo6et-0000jF-Bz for pgsql-bugs@lists.postgresql.org; Fri, 19 Nov 2021 16:22:41 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 1AJGMQ1a3048126; Fri, 19 Nov 2021 11:22:26 -0500 From: Tom Lane To: Thomas Munro cc: Andrey Borodin , Noah Misch , PostgreSQL mailing lists , Michael Paquier , Peter Geoghegan , Andres Freund Subject: Re: conchuela timeouts since 2021-10-09 system upgrade In-reply-to: References: <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> <20211110041541.GA971565@rfd.leadboat.com> <4C43D751-8E0B-478D-B358-7C52BB5AFDAA@yandex-team.ru> <633901636829263@sas1-7f179212b74f.qloud-c.yandex.net> <20211114000952.GA1117894@rfd.leadboat.com> <0CD98EB5-71AC-4D84-BC90-93674B6330F4@yandex-team.ru> Comments: In-reply-to Thomas Munro message dated "Fri, 19 Nov 2021 17:52:59 +1300" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <3048124.1637338946.1@sss.pgh.pa.us> Date: Fri, 19 Nov 2021 11:22:26 -0500 Message-ID: <3048125.1637338946@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Thomas Munro writes: > Oops, that was after it had been cleared already by the OS; duh. On > entry to my wrapper, writefds does in fact contain the bit pattern for > fd 13. That led me to try a very simply C program which runs to > completion on Linux and FreeBSD, but hangs forever on Dragonfly. For completeness, I checked this on macOS, OpenBSD, and NetBSD, and they all give the expected results. regards, tom lane