pg.ddx.io  pgsql-hackers@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@2ndquadrant.com>
Cc: Heikki Linnakangas <hlinnakangas@vmware.com>
Cc: Noah Misch <noah@leadboat.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Something fishy happening on frogmouth
Date: Mon, 04 Nov 2013 10:05:54 -0500
Message-ID: <11702.1383577554@sss.pgh.pa.us> (raw)
In-Reply-To: <20131104111912.GD17233@awork2.anarazel.de>
References: <20131031095021.GA31628@alap2.anarazel.de>
	<CA+Tgmoa6gJAPeMKCK77xzUbhqriO0C+24Ow7ezz4GP8wHCF-EA@mail.gmail.com>
	<22875.1383229757@sss.pgh.pa.us>
	<CA+Tgmobk7nL8MAQdOVPTHzn2pA7aP-kfYvjHTqUsZnbu3FsOxQ@mail.gmail.com>
	<5272EC6A.2020004@vmware.com>
	<CA+TgmoZhFZkdywhCwu-kB9CdrPz_gZ6scSjSjBpjE3W4FPAu=g@mail.gmail.com>
	<20131101162230.GA649568@tornado.leadboat.com>
	<52775A83.7090206@vmware.com>
	<20131104095521.GI3567@awork2.anarazel.de>
	<52778157.9050907@vmware.com>
	<20131104111912.GD17233@awork2.anarazel.de>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-hackers>

Andres Freund <andres@2ndquadrant.com> writes:
> On 2013-11-04 13:13:27 +0200, Heikki Linnakangas wrote:
>> On 04.11.2013 11:55, Andres Freund wrote:
>>> Also, I don't think it's portable across platforms to access segments
>>> that already have been unlinked.

>> See
>> http://pubs.opengroup.org/onlinepubs/009695299/functions/shm_unlink.html:
>> "If one or more references to the shared memory object exist when the object
>> is unlinked, the name shall be removed before shm_unlink() returns, but the
>> removal of the memory object contents shall be postponed until all open and
>> map references to the shared memory object have been removed."

> We also support sysv shmem and have the same cleanup problem there.

And what about Windows?

			regards, tom lane


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers



view thread (38+ messages)  latest in thread

Message-ID: <11702.1383577554@sss.pgh.pa.us>
Permalink:  ../11702.1383577554@sss.pgh.pa.us/
Also on:    postgresql.org/message-id/11702.1383577554@sss.pgh.pa.us

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-hackers@postgresql.org
  Cc: tgl@sss.pgh.pa.us, andres@2ndquadrant.com, hlinnakangas@vmware.com, noah@leadboat.com, robertmhaas@gmail.com, andrew@dunslane.net
  Subject: Re: Something fishy happening on frogmouth
  In-Reply-To: <11702.1383577554@sss.pgh.pa.us>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox