about memory problem for uclinux....

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originally posted by jay_1025@Apr 26 2006, 07:53 PM

hi hippo

i am using spansion s29al032d flash(4mb) on de2 board.

memory using info such as following:

# free

total used free shared buffers

mem: 6380 5636 744 0 0

i have used 5636kb memory that remained 744kb memory on my uclinux os.

i hope to access files from sd card or usb flash. if it can work.

is it enough memory to mount external storage device?

and have any ways to reduce using memory?

thx in advance!

jay

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You have very few memory available.

You should use the 4M cfi flash first.

Spansion was previously a joint venture of AMD and Fujitsu.

[* ] Support for AMD/Fujitsu flash chips

You can use it as a jffs2 drive.

You can mount it as rootfs, with kernel command line "root=/dev/mtdblock0", and disable initramfs. this will save some memory usage.

There is new option,

In kernel config for higher than 2.6.11,

General setup -->

[*] Configure standard kernel features (for small systems) --->

[ ] Enable full-sized data structures for core

No in this option will reduce kernel data structure size.

Using SD is OK, but it is slow.

Using USB disk on isp1362 ? working ?