Hi Rik, Thanks for your answer, I have two more question: > > - Setting the page descriptors PG_reserved flag. > > This should never be used. > (1) Why? (2) In the device driver book from A. Rubini a further method is suggested, namely to set the VM_RESERVED flag of the vma (http://www.xml.com/ldd/chapter/book/ch13.html#t2). What are the characteristics of this method, compared with the ones mentioned in my previous mail? regards Martin -- Supercomputing System AG email: maletinsky@scs.ch Martin Maletinsky phone: +41 (0)1 445 16 05 Technoparkstrasse 1 fax: +41 (0)1 445 16 10 CH-8005 Zurich - Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
