From mboxrd@z Thu Jan  1 00:00:00 1970
From: Robert <xiaguowu@yahoo.com.cn>
Date: Wed, 5 Mar 2008 10:07:54 +0800
Subject: [U-Boot-Users] Ramdisk larger than 8M causes problem
Message-ID: <005801c87e65$bb562200$3400a8c0@xgw>
List-Id: <u-boot.lists.denx.de>
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To: u-boot@lists.denx.de

Hi,

    I am facing a problem that ,I built a ramdisk(16M)  larger than 8M,
the kernel couldn't start up correctly with this ramdisk , the filesystem
couln't be mounted and "kernel panic" happened. But if the ramdisk is 
smaller
 than or equal to 8M , it works fine. I tried the two method as what  the
website
(http://www.denx.de/wiki/view/DULG/RamdiskGreaterThan4MBCausesProblems)
 said. but it takes no effect.
Anybody gives me some hints?
Thanks in advance!
By the way ,I use u-boot-1.1.4 , and cpu core: arm926ej, Memory:128M
Here is the details:
................................................
MDISK: Compressed image found at block 0
Unable to handle kernel NULL pointer dereference at virtual address 0000000c
pgd = c0004000
[0000000c] *pgd=00000000
Internal error: Oops: 5 [#1]
Modules linked in:
CPU: 0
PC is at __mark_inode_dirty+0x28/0x174
LR is at update_atime+0x94/0xc0
pc : [<c003c274>]    lr : [<c0130180>]    Not tainted
sp : c1771720  ip : c1771748  fp : c1771744
r10: 00001000  r9 : 00000000  r8 : 00000000
r7 : c15b3000  r6 : 00000000  r5 : 00000001  r4 : c15af7c8
r3 : 00000000  r2 : 28d0edc8  r1 : 00000001  r0 : c15af7c8
Flags: nzcv  IRQs on  FIQs on  Mode SVC_32  Segment kernel
Control: A005317F  Table: 00004000  DAC: 00000017
Process swapper (pid: 1, stack limit = 0xc17701a0)
Stack: (0xc1771720 to 0xc1772000)
1720: 38db9cd0 2ff7fbc8 c15af7c8 c1771748 00000000 00000000 c1771764 
c1771748
...........................................................................................................................................
Backtrace:
[<c003c24c>] (__mark_inode_dirty+0x0/0x174) from [<c0130180>] 
(update_atime+0x94/0xc0)
 r7 = 00000000  r6 = 00000000  r5 = C1771748  r4 = C15AF7C8
[<c01300ec>] (update_atime+0x0/0xc0) from [<c004112c>] 
(do_generic_mapping_read+0x634/0x648)
 r5 = 00000000  r4 = 001A3000
[<c0040af8>] (do_generic_mapping_read+0x0/0x648) from [<c0101ba0>] 
(__generic_file_aio_read+0x1bc/0x1e0)
[<c01019e4>] (__generic_file_aio_read+0x0/0x1e0) from [<c0101d08>] 
(generic_file_read+0x94/0xc0)
[<c0101c74>] (generic_file_read+0x0/0xc0) from [<c0027864>] 
(vfs_read+0xc0/0x17c)
[<c00277a4>] (vfs_read+0x0/0x17c) from [<c0027970>] (sys_read+0x50/0x7c)
[<c0027920>] (sys_read+0x0/0x7c) from [<c0009648>] (fill_inbuf+0x3c/0x90)
 r8 = 000008E0  r7 = 00000000  r6 = 00000008  r5 = 000008DF
 r4 = C039E79C
[<c000960c>] (fill_inbuf+0x0/0x90) from [<c000972c>] 
(inflate_codes+0x90/0x480)
 r4 = 00000000
[<c000969c>] (inflate_codes+0x0/0x480) from [<c000a310>] 
(inflate_dynamic+0x658/0x6cc)
[<c0009cb8>] (inflate_dynamic+0x0/0x6cc) from [<c000ab9c>] 
(rd_load_image+0x808/0xfdc)
[<c000a394>] (rd_load_image+0x0/0xfdc) from [<c000b518>] 
(initrd_load+0x40/0x304)
[<c000b4d8>] (initrd_load+0x0/0x304) from [<c0008e78>] 
(prepare_namespace+0xa8/0x12c)
[<c0008dd0>] (prepare_namespace+0x0/0x12c) from [<c00b8f80>] 
(init+0x108/0x1d4)
 r5 = C1770000  r4 = C007B084
[<c00b8e78>] (init+0x0/0x1d4) from [<c00e56b4>] (do_exit+0x0/0xae8)
 r6 = 00000000  r5 = 00000000  r4 = 00000000
Code: e1a04000 e5907098 0a000004 e5973024 (e593300c)
 <0>Kernel panic - not syncing: Attempted to kill init!

Best regards,
Rboert