uClinux MMC SPI Driver

When I change the ptf of a working board from 128M to 64M, then the test failed.

Just like what it was on the failed 64M board.

I am learning more kernel debug. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif

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# df

Filesystem 1k-blocks Used Available Use% Mounted on

/dev/hda1 503736 96 503640 0% /mnt# # dd count=800000 bs=512 if=/dev/zero of=/mnt/z2

800000+0 records in

800000+0 records out# # df

df: page allocation failure. order:8, mode:0xd0

Stack from 01f37d98:<0>

<0> 00000008<0> 000346e8<0> 00000000<0> 00000000<0> 00000000<0> 00000010<0> 00000001<0> 000000d0<0>

<0> 000000d0<0> 001e01ec<0> 00000000<0> 001e01e0<0> 001df860<0> ffffe000<0> 03af8e00<0> 000385d0<0>

<0> 00000010<0> 00000002<0> 00000000<0> 000a2098<0> 001f8920<0> 00000000<0> 00000077<0> 0039a080<0>

<0> 00000001<0> 03af8e00<0> 00038174<0> 00000004<0> 0003f240<0> 00000000<0> 00000004<0> 002518c8<0>

<0> 00251880<0> 00000007<0> 000681b8<0> ffffe000<0> 00000004<0> 00018c88<0> 00000001<0> 00003ef8<0>

<0> 00000000<0> 00021254<0> 03af8e00<0> 000771e8<0> 00000002<0> 00000000<0> 01f37f20<0> 01f37f18<0>

Call Trace:<0>

<0> [<00032034>]<0> [<00000000>]<0> [<00000000>]<0> [<00000000>]<0>

<0> [<00000000>]<0> [<00000000>]<0> [<00000000>]<0> [<00000000>]<0>

<0> [<00003ef8>]<0> [<00000000>]<0> [<00000005>]<0> [<00000080>]<0>

<0> [<00000000>]<0> [<00032210>]<0> [<00000000>]<0> [<00000000>]<0>

<0> [<00000014>]<0> [<0001d35c>]<0> [<000000d2>]<0> [<00000000>]<0>

<0> [<000035ae>]<0> [<00060000>]<0> [<00080000>]<0> [<00090000>]<0>

<0> [<00003e00>]<0> [<00000000>]<0> [<000a2098>]<0> [<00000000>]<0>

<0> [<0000d6b8>]<0> [<00000080>]<0> [<00000058>]<0> [<00000000>]<0>

<0> [<00076aa8>]<0> [<0005261c>]<0> [<00000000>]<0> [<00000000>]<0>

<0> [<00000000>]<0> [<00052924>]<0> [<00000000>]<0> [<00002310>]<0>

<0> [<00000e98>]<0> [<00000000>]<0> [<00000000>]<0> [<00000000>]<0>

<0> [<000008d0>]<0> [<00000006>]<0> [<00000000>]<0> [<00000008>]<0>

<0> [<00000018>]<0> [<00000000>]<0> [<0000000b>]<0> [<00000000>]<0>

<0> [<00000000>]<0> [<00000001>]<0> [<00000000>]<0>

Allocation of length 663704 from process 33 failed

DMA per-cpu:

cpu 0 hot: low 14, high 42, batch 7

cpu 0 cold: low 0, high 14, batch 7

Normal per-cpu: empty

HighMem per-cpu: empty

Free pages: 2884kB (0kB HighMem)

Active:7923 inactive:5290 dirty:0 writeback:0 unstable:0 free:721 slab:1992 mapped:0 pagetables:0

DMA free:2884kB min:1024kB low:1280kB high:1536kB active:31692kB inactive:21160kB present:65536kB pages_scanned:0 all_unreclaimable? no

lowmem_reserve[]: 0 0 0

Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no

lowmem_reserve[]: 0 0 0

HighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no

lowmem_reserve[]: 0 0 0

DMA: 35*4kB 59*8kB 16*16kB 1*32kB 1*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 2884kB

Normal: empty

HighMem: empty

Unable to allocate RAM for process text/data, errno 12

scheduling while atomic: df/0x00000001/33

Stack from 01f37f5c:<0>

<0> 00000001<0> 000c6c24<0> 0000232c<0> 000e0440<0> 000e04a4<0> 03d85bd5<0[/b]

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originally posted by jdhar@Apr 12 2006, 12:13 AM

..see, the difference between you and me is that you are actually getting page allocation failures, whereas i am just freezing. waht kernel version did you see that on, .12? do you think it&#39;s still a kernel bug, or maybe the kernel just can&#39;t handle writing 400m with that little ram?

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=14256)

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I am using 2.6.12, as in previous e-mail.

I think it should be a bug somewhere in arch/nios2nommu .

It is not the size of ram and the size of file that matter.

It works with 8M sdram.

hello all

Do you have dirve usb device on DE2 board?

if yes.

Can i read or write files form external disk to pass through usb device?

thx

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originally posted by jay_1025@Apr 14 2006, 03:56 AM

hello all

do you have dirve usb device on de2 board?

if yes.

can i read or write files form external disk to pass through usb device?

thx

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=14345)

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Jay, you have to post this as another new top. Not here.

Is the README file still available? I have found the location in the kernel configuration but I cannot find any more information on implementing the SD card interface.

Thanks in advance.