o.k. , here is the full description: the platform is compaq-ipaq (pda) it has 32M flash and 64M ram
it comes with windows ce installed on it, windows ce does not write to flash but keeps everything on a ramdisk which is not erased by reset. the ram has allways power by battary. i have installed linux on it, i want linux also to be able to have a ramdisk which will not be erased by boot. if i use a regular ramdisk, i will not be able to do so as the kernel will not give the same pages all the time ... so what i wanted to do, is to make the kernel ignore some of the memory ( so it will not be initialized nor used by the system) and have a ramdisk which will give access to that memory. currently i'm testing it on a pc with 512M ram. one can not access physical memory, only virtual memory. the linux kernel, by default, maps all physical memory to virtual one. the problem is that if i tell it to use less memory, via mem=... i get the rest of the physical memory not mapped to virtual adresses. one solution is to let the ramdisk map the physical to virtual, but i do not know how to do that ... any other ideas ? On Mon, 2002-01-21 at 15:05, Nadav Har'El wrote: > On Mon, Jan 21, 2002, Erez Doron wrote about "Re: kernel mem use": > > i do not have any permanant medium, i only have a small flash area, and a lot of >ram, i > > also do not want to write to the flash ! > > Then by what kind of magic do you expect the memory contents to be preserved > across boot? Are you sure memory isn't cleared by the boot process (either by > power being stopped, or by the bios memory check, or who knows what)? > > Not to mention that after a hard reboot (power off and then back on) you'll > certainly lose the content of the memory. > > -- > Nadav Har'El | Monday, Jan 21 2002, 8 Shevat 5762 > [EMAIL PROTECTED] |----------------------------------------- > Phone: +972-53-245868, ICQ 13349191 |From the Linux getopt(3) manpage: "BUGS: > http://nadav.harel.org.il |This manpage is confusing." ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
