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Date: | Wed, 1 Apr 2009 11:19:28 +0530 |
Message-ID: | <bc2e28c70903312249t63444b70la92732bb3a05afe5@mail.gmail.com> |
Subject: | Re: IPC,FORK on Windows 2008 Server |
From: | Yarlagadda Suresh <ysuresh DOT forum AT gmail DOT com> |
To: | cygwin AT cygwin DOT com |
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Thanks a ton for your quick response. Could please let me know the patch version number, which includes the fix? Cheers, Suresh Kumar. On Tue, Mar 31, 2009 at 8:37 PM, Corinna Vinschen <corinna-cygwin AT cygwin DOT com> wrote: > On Mar 31 14:08, Corinna Vinschen wrote: >> On Mar 31 17:11, Yarlagadda Suresh wrote: >> > Hi, >> > >> > I am using shmget()/shmat() methods for getting the shared memory. >> > >> > I had tried running the same program which is given in the previous >> > mention thread, the results are same as mentioned over there. >> >> I just tried that testcase with Cygwin 1.7 and it appears to work most >> of the time. =A0 Unfortunately I can still reproduce the problem once per >> about 30 forks. >> >> I'll look into fixing this for Cygwin 1.7. =A0However, please note that >> there is no *really* foolproof method to fix this due to the way fork >> has to be implemented using Win32 calls. =A0I can only make it much more >> unlikely than today. > > I applied a patch to Cygwin which allocates the shmat() shared memory > regions top-down, same as the mmap() regions. =A0This should make the > observed effect at fork() pretty unlikely. =A0The patch will be in the > next Cygwin 1.7.0 test release (in a couple of days). > > > Thanks for the report, > Corinna > > -- > Corinna Vinschen =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Please, send mails re= garding Cygwin to > Cygwin Project Co-Leader =A0 =A0 =A0 =A0 =A0cygwin AT cygwin DOT com > Red Hat > > -- > Unsubscribe info: =A0 =A0 =A0http://cygwin.com/ml/#unsubscribe-simple > Problem reports: =A0 =A0 =A0 http://cygwin.com/problems.html > Documentation: =A0 =A0 =A0 =A0 http://cygwin.com/docs.html > FAQ: =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 http://cygwin.com/faq/ > > -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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