On Thu, May 06, 2004 at 10:19:43AM -0700, Yashwant Shitoot wrote:
> Hello Friends,
Allright, dinner on you ;-)
> My root file system and linux is in rom (flash). The linux itself runs
> out of ram. When I reprogram the rom, I erase and write a new image of
> the rom from a compact flash card. After the new image is programmed in
> the function fclose() hangs up, implying that fclose() is rom resident
> and loaded as needed. Does this make sense ?
Demand loading that is the binary will be paged in from backing store
(which is your ROM) as needed.
> Remember even after erasing the rom fopen() works fine.
Linux may at any time deciede to discard a page of memory. It does so
when it think it has a better use for that memory.
Rewriting the underlying device of any filesystem is not a safe thing to
do. A possible safe approach would be running from a ramdisk, for example.