From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9752 invoked by alias); 18 Jun 2012 14:51:48 -0000 Received: (qmail 9688 invoked by uid 22791); 18 Jun 2012 14:51:21 -0000 X-Spam-Check-By: sourceware.org Received: from aquarius.hirmke.de (HELO calimero.vinschen.de) (217.91.18.234) by sourceware.org (qpsmtpd/0.83/v0.83-20-g38e4449) with ESMTP; Mon, 18 Jun 2012 14:51:06 +0000 Received: by calimero.vinschen.de (Postfix, from userid 500) id D5AD12C0071; Mon, 18 Jun 2012 16:51:03 +0200 (CEST) Date: Mon, 18 Jun 2012 14:51:00 -0000 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Windows 8 Release Preview. fork problems with rsync Message-ID: <20120618145103.GA26243@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <20120606123434.GA27662@calimero.vinschen.de> <20120606161217.GB30795@calimero.vinschen.de> <20120606182929.GD30795@calimero.vinschen.de> <4FD06267.4040204@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <4FD06267.4040204@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com X-SW-Source: 2012-06/txt/msg00311.txt.bz2 On Jun 7 10:12, Noel Grandin wrote: > > > On 2012-06-06 20:29, Corinna Vinschen wrote: > > >On Jun 6 17:59, Nick Lowe wrote: > >>>Thanks. I can confirm the effect. For no apparent reason, the OS > >>>reserves a 1 Megs shared memory region, top-down allocated, of which it > >>>uses about 20K. It's not the PEB or one of the TEBs, though. Nor is > >>>it a thread stack. I checked, and it turns out that it's allocated > >>>in every process, on 32 and 64 bit systems. That's kind of worrying > >>>since that's bound to collide with mmaped regions and pthread stacks a > >>>lot. I don't know what to do at this point. > > > > > > I assume you've seem the VMMap tool? > http://technet.microsoft.com/en-us/sysinternals/dd535533.aspx Yes, and I also know how to use /proc/$PID/maps to get a memory map of a process. It's not a problem to see the used memory slot. The problem is that it exists at all. There's no such thing on pre-W8 systems. Only the PEB and the TEBs are allocated top-down and they usually don't collide. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple