Hi, - is there a way to acquire physically contiguous DRAM pages by memory mapping /dev/mem or /dev/zero? Would this method guarantee physical continuity and fail otherwise or just be best-effort and allocate non-contiguous memory in case of a failure? Any details/insights on the mmap() flags needed to be used would be welcome.
- on a similar note. Let's assume the kernel is booted with the "mem=X" option, where the amount of physical DRAM present in the system is actually more than X. If a userspace program tries to mmap a portion of /dev/mem/ beyond the X MBytes visible to the system, what happens in the kernel? How are the requested "out-of-range" pages treated differently than normal memory pages? Would this scenario, i.e. mmaping "out-of-range" pages, be suitable for the first question above? thanks for any help, - Vasilis -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to [email protected] Please read the FAQ at http://kernelnewbies.org/FAQ
