Hi, I tried with the /proc/sys/vm/overcommit_memory=2 and the system refused to load the program altogether. In this scenario is making overcommit_memory=2 a good idea? Regards, Abu. -----Original Message----- From: Robert Hancock [mailto:hancockr@xxxxxxx] Sent: Saturday, July 08, 2006 11:36 PM To: Abu M. Muttalib Cc: kernelnewbies@xxxxxxxxxxxx; linux-newbie@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux-mm Subject: Re: Commenting out out_of_memory() function in __alloc_pages() Abu M. Muttalib wrote: > Hi, > > I am getting the Out of memory. > > To circumvent the problem, I have commented the call to "out_of_memory(), > and replaced "goto restart" with "goto nopage". > > At "nopage:" lable I have added a call to "schedule()" and then "return > NULL" after "schedule()". Bad idea - in the configuration you have, the system may need the out-of-memory killer to free up memory, otherwise the system can deadlock due to all memory being exhausted. > > I tried the modified kernel with a test application, the test application is > mallocing memory in a loop. Unlike as expected the process gets killed. On > second run of the same application I am getting the page allocation failure > as expected but subsequently the system hangs. > > I am attaching the test application and the log herewith. > > I am getting this exception with kernel 2.6.13. With kernel > 2.4.19-rmka7-pxa1 there was no problem. > > Why its so? What can I do to alleviate the OOM problem? Please see Documentation/vm/overcommit-accounting in the kernel source tree. -- Robert Hancock Saskatoon, SK, Canada To email, remove "nospam" from hancockr@xxxxxxxxxxxxx Home Page: http://www.roberthancock.com/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
