X-Recipient: archive-cygwin@delorie.com X-Spam-Check-By: sourceware.org Date: Tue, 27 Nov 2012 08:13:02 +0100 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Possible race in SYSV IPC (semaphores) Message-ID: <20121127071302.GA13311@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <20121123113605.GN17347@calimero.vinschen.de> <20121123131020.GR17347@calimero.vinschen.de> <20121123133332.GU17347@calimero.vinschen.de> <20121123164404.GX17347@calimero.vinschen.de> <5F8AAC04F9616747BC4CC0E803D5907D0162C6@MLBXv04.nih.gov> <20121123172937.GA12624@calimero.vinschen.de> <5F8AAC04F9616747BC4CC0E803D5907D0162E7@MLBXv04.nih.gov> <20121123175903.GA11546@calimero.vinschen.de> <20121126125342.GA3800@calimero.vinschen.de> <5F8AAC04F9616747BC4CC0E803D5907D016FEA@MLBXv04.nih.gov> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <5F8AAC04F9616747BC4CC0E803D5907D016FEA@MLBXv04.nih.gov> User-Agent: Mutt/1.5.21 (2010-09-15) Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com On Nov 26 18:09, Lavrentiev, Anton (NIH/NLM/NCBI) [C] wrote: > > I just checked in the change. > > Thank you. I will test it as soon as it's available in a snapshot. > > > ...especially since I can't reproduce this. I tried with cygserver > > before and after my patch and in both cases your semaphore testcase > > worked as expected with -d -l 7. > > I see. Maybe this will help. My sequence of actions: > > In an elevated cmd.exe, from Cygwin's /bin: > > cygrunsrv.exe -I cygserver -x /usr/sbin/cygserver.exe -a "-d -l 7" > cygrunsrv.exe -S cygserver > > In a regular cmd.exe: > > a.exe > > (this is my testcase that locks/unlocks the semaphores). > It never gets past iteration 1000. Nope, no luck. WJFFM. You don't have space (or quota) issues on your hard disk by any chance? The stderr output will go to /var/log/cygserver.log. The file has a size of about 60 Megs after 20K iterations and every run of the cygserver service will append to the file. 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