Can you use mlock() from user space, before you pass down the memory to kernel space ? $ man mlock dom -----Original Message----- From: kernelnewbies-bounce@nl.linux.org [mailto:kernelnewbies-bounce@nl.linux.org] On Behalf Of Timur Tabi Sent: Thursday, June 10, 2004 11:30 AM To: kernelnewbies@nl.linux.org Subject: When can I call SetPageReserved()? I'm trying to figure out what kind of memory I can call SetPageReserved() on. Is it okay to use it on memory obtained via a kiobuf? I get the feeling that SetPageReserved() should only be used on memory that is allocated in the kernel itself, such as a DMA buffer allocated via kmalloc(), and never on memory that is allocated by a user process (which is what kiobuf gives me). Is that correct? The problem we're seeing is that the VM is swapping out pages obtained via a kiobuf. We can't use lock_kiobuf() because sometimes the memory regions overlap, and lock_kiobuf() rejects attempts to lock memory that already has at least one locked page. -- Timur Tabi Staff Software Engineer timur.tabi@ammasso.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
