Re: Kernel OOPS - JFFS2 file system on NOR flash

[Darius Augulis <augulis.darius@gmail.com>]

hari prasath wrote:
> Dear all,
> 
> I have a embedded device with 32MB NOR flash. I am mounting a part of 
> this as a MTD device.

what is the part number of memory chip?

> 
> Now i have a script which echo's a string to a file in the flash. At 
> certain stage, the 'echo' process becomes a Demon. 'dmesg' shows that 
> 'Kernel unable to handle page request is generated"
> 
> The output of 'dmesg' is given below for reference.
> 
> I am using linux kernel 2.6.22 and my NOR flash is a Intel P30 device.
> 
> argh. node added in wrong place
> Unable to handle kernel paging request at virtual address ffffffee
> pgd = c3df8000
> [ffffffee] *pgd=a0002021, *pte=00000000, *ppte=00000000
> Internal error: Oops: f3 [#1]
> Modules linked in: modem_driver Gpio_ctrl
> CPU: 0    Not tainted  (2.6.22 #1)
> PC is at jffs2_add_full_dnode_to_inode+0xb8/0x408
> LR is at jffs2_add_full_dnode_to_inode+0x60/0x408
> pc : [<c00e4ddc>]    lr : [<c00e4d84>]    psr: a0000013
> sp : c3db9c50  ip : c3846fb0  fp : c3db9c74
> r10: c2894200  r9 : 000015bc  r8 : c3be4cf8
> r7 : c2d941ac  r6 : c3846aa0  r5 : c3846fb0  r4 : c2d94198
> r3 : c3be4cf8  r2 : ffffffea  r1 : 000015bc  r0 : 000015bc
> Flags: NzCv  IRQs on  FIQs on  Mode SVC_32  Segment user
> Control: 0000397f  Table: a3df8000  DAC: 00000015
> Process echo (pid: 4474, stack limit = 0xc3db8260)
> Stack: (0xc3db9c50 to 0xc3dba000)
> 9c40:                                     c3be4cf8 c2d8af98 c2d94198 
> c2894200
> 9c60: 00000000 00000000 c3db9ccc c3db9c78 c00e986c c00e4d30 00000022 
> 00000003
> 9c80: 00000000 00000000 c38085bc 00000022 00000022 c38085bc 00008cb0 
> 2bdf0c0b
> 9ca0: 2bdf0c0b c2d94198 000005bc c2894200 c2d8af98 c2d941c4 000005bc 
> c036d100
> 9cc0: c3db9d18 c3db9cd0 c00e481c c00e9618 000015bc 00000022 c3db9ce4 
> 00000000
> 9ce0: 000005de 00000000 49d2e5da 49d2e5da 00000022 c3db8000 00000000 
> 00000022
> 9d00: c036d100 40000000 000005bc c3db9db4 c3db9d1c c005db24 c00e46f4 
> c004f91c
> 9d20: 000005de c2d941c4 c023b510 c2d94258 c1b3e720 00000001 c3db9e9c 
> 00000000
> 9d40: 00000000 c3db9e94 50d941c4 00000000 00000000 c3db9de4 c2894400 
> c3db9d94
> 9d60: c3db9d6c c00945f8 c00eefe0 c3db9d94 c3db9d7c c2d941c4 c3db9d98 
> 00000001
> 9d80: c3db9de4 000015bc c3db9db8 000015bc 00000000 c3db9de8 c3db9de4 
> 000015bc
> 9da0: 00000000 00000000 c3db9e48 c3db9dbc c005e4c4 c005d718 000015bc 
> 00000000
> 9dc0: c3db9ee4 00000022 00000000 00000000 c2d94258 c1b3e720 c3db9ee4 
> c3db9e94
> 9de0: c3db9e9c 00000022 000015bc 00000000 00000022 00000001 00000044 
> 000200d2
> 9e00: c02cf2b0 00000000 000200d2 c02cf2ac 00000000 c3d23d60 c1b39d00 
> c3db9e68
> 9e20: c3db9e9c c2d941c4 00000000 00000000 c3db9ee4 00000001 c2d9422c 
> c3db9e88
> 9e40: c3db9e4c c005e578 c005dfd4 c3d8a800 c3db9e78 c2d94258 c1b3e720 
> c3db9e94
> 9e60: 00000000 00000000 c3db9e9c c3db9ee4 c1b3e720 c3db9e94 c3db9f78 
> c3db9f4c
> 9e80: c3db9e90 c0077940 c005e504 00000000 00000000 40000000 00000022 
> 00069000
> 9ea0: c3db9ebc 00000000 00000001 ffffffff c1b3e720 00000000 00000000 
> 00000000
> 9ec0: 00000000 c1b39d00 00000000 00000000 c281e4a8 c1b39d00 c004c740 
> c3db9edc
> 9ee0: c3db9edc 00000000 00000000 c3db8000 00069000 c3db9f4c c3db9f04 
> c0069da8
> 9f00: 00000022 c0029834 00000000 00000000 00000000 00000000 c3df8000 
> 00000000
> 9f20: 00000002 c1b3e720 40000000 c0077880 00000022 c3db9f78 c3db8000 
> 00000002
> 9f40: c3db9f74 c3db9f50 c0077a5c c007788c c0027254 c1b3e740 c1b3e720 
> c3db9f78
> 9f60: 00000000 00000000 c3db9fa4 c3db9f78 c0077ba0 c007799c 00000000 
> 00000000
> 9f80: 00000000 40000000 00000022 0017ba08 00000004 c0023f84 00000000 
> c3db9fa8
> 9fa0: c0023de0 c0077b60 40000000 00000022 00000001 40000000 00000022 
> 40000000
> 9fc0: 40000000 00000022 0017ba08 00000022 00000022 00192304 00000002 
> 000082d0
> 9fe0: 00000000 be85fc14 000b9804 000e1704 60000010 00000001 00000000 
> 00000000
> Backtrace:
> [<c00e4d24>] (jffs2_add_full_dnode_to_inode+0x0/0x408) from [<c00e986c>] 
> (jffs2_write_inode_range+0x260/0x36c)
> [<c00e960c>] (jffs2_write_inode_range+0x0/0x36c) from [<c00e481c>] 
> (jffs2_commit_write+0x134/0x270)
> [<c00e46e8>] (jffs2_commit_write+0x0/0x270) from [<c005db24>] 
> (generic_file_buffered_write+0x41c/0x610)
> [<c005d70c>] (generic_file_buffered_write+0x4/0x610) from [<c005e4c4>] 
> (__generic_file_aio_write_nolock+0x4fc/0x52c)
> [<c005dfc8>] (__generic_file_aio_write_nolock+0x0/0x52c) from 
> [<c005e578>] (generic_file_aio_write+0x84/0x100)
> [<c005e4f8>] (generic_file_aio_write+0x4/0x100) from [<c0077940>] 
> (do_sync_write+0xc0/0x110)
> [<c0077880>] (do_sync_write+0x0/0x110) from [<c0077a5c>] 
> (vfs_write+0xcc/0x150)
> [<c0077990>] (vfs_write+0x0/0x150) from [<c0077ba0>] (sys_write+0x4c/0x74)
>  r8:00000000 r7:00000000 r6:c3db9f78 r5:c1b3e720 r4:c1b3e740
> [<c0077b54>] (sys_write+0x0/0x74) from [<c0023de0>] 
> (ret_fast_syscall+0x0/0x2c)
>  r8:c0023f84 r7:00000004 r6:0017ba08 r5:00000022 r4:40000000
> Code: 13833003 15823004 e596300c e5932000 (e5923004)
> Node totlen on flash (0x00000046) != totlen from node ref (0x00000058)
> Node totlen on flash (0x00000000) != totlen from node ref (0x0000005c)
> 
> 
> -- 
> Best Regards,  
> G.E.Hari Prasath
> 
> 
> 
> 
> 
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