Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wUXWC-001Egz-1M for pgsql-hackers@arkaria.postgresql.org; Tue, 02 Jun 2026 22:23:28 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.96) (envelope-from ) id 1wUXWA-00GDNw-1i for pgsql-hackers@arkaria.postgresql.org; Tue, 02 Jun 2026 22:23:26 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wUXWA-00GDNo-0f for pgsql-hackers@lists.postgresql.org; Tue, 02 Jun 2026 22:23:26 +0000 Received: from fout-b2-smtp.messagingengine.com ([202.12.124.145]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wUXW8-00000000oby-1hVi for pgsql-hackers@lists.postgresql.org; Tue, 02 Jun 2026 22:23:25 +0000 Received: from phl-compute-01.internal (phl-compute-01.internal [10.202.2.41]) by mailfout.stl.internal (Postfix) with ESMTP id 7DE341D000B3; Tue, 2 Jun 2026 18:23:23 -0400 (EDT) Received: from phl-frontend-03 ([10.202.2.162]) by phl-compute-01.internal (MEProxy); Tue, 02 Jun 2026 18:23:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=paquier.xyz; h= cc:cc:content-type:content-type:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:subject :subject:to:to; s=fm1; t=1780439003; x=1780525403; bh=e9nKzmrois Jl+IDbT5dkwFUbeBOQgNR1gCzEsoT/OFg=; b=rlEub1oEj82oR5fULYZaXL27D3 8mtRXLpV+nq0js5mNdnkIz/XmI/PVj9U6hZKkQv7AACF4sLhM1QCb9nwEdCpR/g8 i2X56hTsu4SEi4qvIeE5jxsENh3x0osKwTIv7yMqLspeY9lRnUTdASDEWs+GUen2 SMXXPIkkbBIzO+gjV088brLwQ7xB8RnyQixYUkNjb1YGjLoC7T7sRqdY+HdhQbch RJrj94mU0mOQ/CnMEIDuZYBxV9OGP6GK/yRMnPCnz+7tawS9L5oCsVLX3XHpPftY 7q1jhvIglq/6dOuu109XHxpBevlOpkDwfTdWrwyjNUcqXcgc7Sf1bVQi2Ztg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:content-type:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:subject:subject:to :to:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; t= 1780439003; x=1780525403; bh=e9nKzmroisJl+IDbT5dkwFUbeBOQgNR1gCz EsoT/OFg=; b=VT390Q+mySoP4jo/dNhjThyBjjz+Qfj7M3LzctsJXsyryc7xe2k PQY0Z5Lln6l/S2nnoE5PYHigZ16cqusfxWP3QVzECosQfO9vVzEuv0J/bxtw9vT/ Ckb+8S4OK8Qz0+OOeVcCvz/+V+zLoe/dH6vMRq0ipQiABQpQ9oEo1C6jtHV3gXRC +9AeVMcK8bSX2SZx7p0nQtmMwqvdXQJo+e7aZk1SeuIbD3dJ+nnvGEWLP+/n+f4i bQvyKJLlcyWTuVAMlT8sUnEks5ee4Db0eIokEI7UIPSmzh4QHDmHccH+xKG01TEA OUJ/3ZkTfOF/mdcbZSOuRZqQEjSxeVUN+sA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTGchyo+qAh9l0oSXWnw8h9IT9qqQwgueKGN9eUeIFD7EE7ct0wCQKAke6Jg65jH43 0G3lyy6MS6lK0AhEOc0Gwhpxvw6ZiYMxuyybjLAOUdD68lhs4rXH1VKtqMsQUGhFem150G PJcMf/UlafCWOlvecvOKkK+0S0Bv+luRtYO5XDZKQH2QEzSkPiKRpxTdtCXYWgYJng3bvo 0j4YLAFBGcaQkDCu3IiQabs6mL5BBV5lYhPIqOjSqQrbHcSpRax2bVmyTsqw4qpZ4d238g DsXkx8uyKyLqWRhCr3MZREB8N8+16wZHD2qY+36L9TgyyIu/oaiv7uOq6R5HQi3Gy+2omx /RHFQSGlRTI0+QUivWMmsC04qhZqG5UdtESsYWTy5HFVQQ5lQciQQWKrXHsVZIFa+4yVRl SnEflp4g7wJxgASDOgerj+4gDkuurCEcnNkI3RibhwiYu3RIyAnxi1xzrd27Gm+VIqMFrk apfYemSiH/Hv8+JA8OyvuT0hccXb8eXcjIB1vLDXnfkC7Ymh6goR/VQoLd3emRPRkdOSWm 5aQRUM975F9uFgkUdU0gq2ftqprQPWxXpTkOPrw1YoE1BTU0Ky7vGK/j+qyO6+zj3BSV4j ODr4YlRsV1ePwUg2wTX6caQbMYLGuVrveDLNyEQGkjTfn+Ht8RDPCiBuufPA X-ME-Proxy: Feedback-ID: i0fe9450f:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 2 Jun 2026 18:23:21 -0400 (EDT) Date: Wed, 3 Jun 2026 07:23:16 +0900 From: Michael Paquier To: Andrey Borodin Cc: Robert Haas , Postgres hackers , Heikki Linnakangas Subject: Re: injection_points: Switch wait/wakeup to use atomics rather than latches Message-ID: References: <46821C66-E6B2-420D-BB83-E20EF36665B8@yandex-team.ru> <688F6266-3901-4C84-B27A-AF5904801A3A@yandex-team.ru> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="EbhjIBRZOAzbZAhS" Content-Disposition: inline In-Reply-To: <688F6266-3901-4C84-B27A-AF5904801A3A@yandex-team.ru> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --EbhjIBRZOAzbZAhS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Jun 02, 2026 at 11:46:52PM +0500, Andrey Borodin wrote: > For tests without PGPROC we can mmap() inj_state to a fixed file in > PGDATA/injection_points.shm. TAP can poll name[] to detect that a wait > point was reached and bump wait_counts[] to wake. That's a direction. Only mmap() would not be sufficient, as WIN32 has its own non-POSIX idea on the matter with CreateFileMapping() & friends. I am wondering if we should think harder about an interface that could make such things easier for extensions. Or we could have a portable layer added to injection_points, as well.. -- Michael --EbhjIBRZOAzbZAhS Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEG72nH6vTowiyblFKnvQgOdbyQH0FAmofV9QACgkQnvQgOdby QH0j6Q//XUTI8+xU/5O+eoT5KF4PJCaEOH2Wyccqsu8fIiffESlyE9VCwG5evGKX E2DusDC/zPKX3EPJCH4nkEqVhQaPzV8aDb5B9e/E2VdIgdCJHvxfEsEslYkQBOCc L5p/IIn0ZaCAn2Pkiq0Mczs/BsAc4RReE8psRWSwbLB26OXQ40T1uJnFp9pBckgp 9jm/5uaiRDKhO12mEei/aLoiMF28+pvT6zNsYRT+yEWmP/cEKx05TZ+QdWVlFSWS 9MS2PwW9+nDJDG0q34KD7GJ6H7bFtAQ2zxiENkgqXuXmmnhdAoxNV6HVO8DfUR1P eZOcnGrZkxaHTJU0wnPey9FVU54/uxktL7e3MNpSeZs350cmzafwTMISqVE6BShA xE8gtr19X2y0cD6YII+afqt33OIVNj6a06NlbK7P4L4ImgAqBaV6bkj5N+fqtWrH ehLg/4+B2dCKZdQdTQNq2C1T3uadPuUi5M6NsOxXFuIrlejbVwa43Lmx6lRVy3/l HApuF1WGewem3OI2wucjf4JQve4qBqeUsC0m+kybubx3uyuGGltLAUNgjSrnUBe7 AH4zWA71zMibgQyKiMXTbVVB16f4TxjsAQsEcYo1/WHXrRPNqZPC6BKV8SsbE/pV y0nSG4I3my1RRCgSUfeec5D3ybQ8rmwqY6Hgqgmfo+huEUGTxQQ= =Jw02 -----END PGP SIGNATURE----- --EbhjIBRZOAzbZAhS--