On Fri, 21 Jul 2006, Mulyadi Santosa wrote: > > Is it possible to do some kind of page locking or pinning from > > application, so that kernel doesn't swap out the page as long as > use mmap(MAP_NORESERVE) to make the user mode pages unswappable... Wrong. MAP_NORESERVE tells kernel not to reserve space in swap space for this mapping (which is otherwise done, so that the page could be safely swapped out when needed). In case you have a MAP_NORESERVE mapping and you try to write into it when the system is low on memory, you will get segfault. mlock() makes user pages nonswappable. But it needs root privileges to do so. -- JiKos. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
