Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15502.47003.444262.965070@asv-058.sjc.ca.bbnow.net> Date: Tue, 12 Mar 2002 18:21:15 -0800 From: Stephen Weeks To: cygwin AT cygwin DOT com cc: Heribert Dahms Subject: RE: mmap of large amount returns invalid pointer In-Reply-To: References: X-Mailer: VM 6.89 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid > looks like you have overlooked that mmap doesn't return NULL > despite win32 error in strace (see below): > > c:\>net helpmsg 1455 > > The paging file is too small for this operation to complete. Thanks for pointing that out. I agree that it looks like the Cygwin dll is failing to check for the Win32 error, which should have caused mmap to return -1. But even if that is fixed, I don't understand why Cygwin/mmap is unable to obtain the memory. My earlier message showed that at the start of the program the information returned by GlobalMemoryStatus shows that there is easily >300Mb available. TotalPhys: 209113088 AvailPhys: 166580224 TotalPageFile: 309587968 AvailPageFile: 275365888 TotalVirtual: 2147352576 AvailVirtual: 1589841920 I tried a modified version of the program that uses VirtualAlloc/Free instead of mmap/munmap and it is able to allocate, zero, and free 300Mb. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/