Dear all,<br><br>I have a embedded device with 32MB NOR flash. I am mounting a part of this as a MTD device.<br><br>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"<br>
<br>The output of 'dmesg' is given below for reference.<br><br>I am using linux kernel 2.6.22 and my NOR flash is a Intel P30 device.<br><br>argh. node added in wrong place<br>Unable to handle kernel paging request at virtual address ffffffee<br>
pgd = c3df8000<br>[ffffffee] *pgd=a0002021, *pte=00000000, *ppte=00000000<br>Internal error: Oops: f3 [#1]<br>Modules linked in: modem_driver Gpio_ctrl<br>CPU: 0 Not tainted (2.6.22 #1)<br>PC is at jffs2_add_full_dnode_to_inode+0xb8/0x408<br>
LR is at jffs2_add_full_dnode_to_inode+0x60/0x408<br>pc : [<c00e4ddc>] lr : [<c00e4d84>] psr: a0000013<br>sp : c3db9c50 ip : c3846fb0 fp : c3db9c74<br>r10: c2894200 r9 : 000015bc r8 : c3be4cf8<br>r7 : c2d941ac r6 : c3846aa0 r5 : c3846fb0 r4 : c2d94198<br>
r3 : c3be4cf8 r2 : ffffffea r1 : 000015bc r0 : 000015bc<br>Flags: NzCv IRQs on FIQs on Mode SVC_32 Segment user<br>Control: 0000397f Table: a3df8000 DAC: 00000015<br>Process echo (pid: 4474, stack limit = 0xc3db8260)<br>
Stack: (0xc3db9c50 to 0xc3dba000)<br>9c40: c3be4cf8 c2d8af98 c2d94198 c2894200 <br>9c60: 00000000 00000000 c3db9ccc c3db9c78 c00e986c c00e4d30 00000022 00000003 <br>9c80: 00000000 00000000 c38085bc 00000022 00000022 c38085bc 00008cb0 2bdf0c0b <br>
9ca0: 2bdf0c0b c2d94198 000005bc c2894200 c2d8af98 c2d941c4 000005bc c036d100 <br>9cc0: c3db9d18 c3db9cd0 c00e481c c00e9618 000015bc 00000022 c3db9ce4 00000000 <br>9ce0: 000005de 00000000 49d2e5da 49d2e5da 00000022 c3db8000 00000000 00000022 <br>
9d00: c036d100 40000000 000005bc c3db9db4 c3db9d1c c005db24 c00e46f4 c004f91c <br>9d20: 000005de c2d941c4 c023b510 c2d94258 c1b3e720 00000001 c3db9e9c 00000000 <br>9d40: 00000000 c3db9e94 50d941c4 00000000 00000000 c3db9de4 c2894400 c3db9d94 <br>
9d60: c3db9d6c c00945f8 c00eefe0 c3db9d94 c3db9d7c c2d941c4 c3db9d98 00000001 <br>9d80: c3db9de4 000015bc c3db9db8 000015bc 00000000 c3db9de8 c3db9de4 000015bc <br>9da0: 00000000 00000000 c3db9e48 c3db9dbc c005e4c4 c005d718 000015bc 00000000 <br>
9dc0: c3db9ee4 00000022 00000000 00000000 c2d94258 c1b3e720 c3db9ee4 c3db9e94 <br>9de0: c3db9e9c 00000022 000015bc 00000000 00000022 00000001 00000044 000200d2 <br>9e00: c02cf2b0 00000000 000200d2 c02cf2ac 00000000 c3d23d60 c1b39d00 c3db9e68 <br>
9e20: c3db9e9c c2d941c4 00000000 00000000 c3db9ee4 00000001 c2d9422c c3db9e88 <br>9e40: c3db9e4c c005e578 c005dfd4 c3d8a800 c3db9e78 c2d94258 c1b3e720 c3db9e94 <br>9e60: 00000000 00000000 c3db9e9c c3db9ee4 c1b3e720 c3db9e94 c3db9f78 c3db9f4c <br>
9e80: c3db9e90 c0077940 c005e504 00000000 00000000 40000000 00000022 00069000 <br>9ea0: c3db9ebc 00000000 00000001 ffffffff c1b3e720 00000000 00000000 00000000 <br>9ec0: 00000000 c1b39d00 00000000 00000000 c281e4a8 c1b39d00 c004c740 c3db9edc <br>
9ee0: c3db9edc 00000000 00000000 c3db8000 00069000 c3db9f4c c3db9f04 c0069da8 <br>9f00: 00000022 c0029834 00000000 00000000 00000000 00000000 c3df8000 00000000 <br>9f20: 00000002 c1b3e720 40000000 c0077880 00000022 c3db9f78 c3db8000 00000002 <br>
9f40: c3db9f74 c3db9f50 c0077a5c c007788c c0027254 c1b3e740 c1b3e720 c3db9f78 <br>9f60: 00000000 00000000 c3db9fa4 c3db9f78 c0077ba0 c007799c 00000000 00000000 <br>9f80: 00000000 40000000 00000022 0017ba08 00000004 c0023f84 00000000 c3db9fa8 <br>
9fa0: c0023de0 c0077b60 40000000 00000022 00000001 40000000 00000022 40000000 <br>9fc0: 40000000 00000022 0017ba08 00000022 00000022 00192304 00000002 000082d0 <br>9fe0: 00000000 be85fc14 000b9804 000e1704 60000010 00000001 00000000 00000000 <br>
Backtrace: <br>[<c00e4d24>] (jffs2_add_full_dnode_to_inode+0x0/0x408) from [<c00e986c>] (jffs2_write_inode_range+0x260/0x36c)<br>[<c00e960c>] (jffs2_write_inode_range+0x0/0x36c) from [<c00e481c>] (jffs2_commit_write+0x134/0x270)<br>
[<c00e46e8>] (jffs2_commit_write+0x0/0x270) from [<c005db24>] (generic_file_buffered_write+0x41c/0x610)<br>[<c005d70c>] (generic_file_buffered_write+0x4/0x610) from [<c005e4c4>] (__generic_file_aio_write_nolock+0x4fc/0x52c)<br>
[<c005dfc8>] (__generic_file_aio_write_nolock+0x0/0x52c) from [<c005e578>] (generic_file_aio_write+0x84/0x100)<br>[<c005e4f8>] (generic_file_aio_write+0x4/0x100) from [<c0077940>] (do_sync_write+0xc0/0x110)<br>
[<c0077880>] (do_sync_write+0x0/0x110) from [<c0077a5c>] (vfs_write+0xcc/0x150)<br>[<c0077990>] (vfs_write+0x0/0x150) from [<c0077ba0>] (sys_write+0x4c/0x74)<br> r8:00000000 r7:00000000 r6:c3db9f78 r5:c1b3e720 r4:c1b3e740<br>
[<c0077b54>] (sys_write+0x0/0x74) from [<c0023de0>] (ret_fast_syscall+0x0/0x2c)<br> r8:c0023f84 r7:00000004 r6:0017ba08 r5:00000022 r4:40000000<br>Code: 13833003 15823004 e596300c e5932000 (e5923004) <br>Node totlen on flash (0x00000046) != totlen from node ref (0x00000058)<br>
Node totlen on flash (0x00000000) != totlen from node ref (0x0000005c)<br><br clear="all"><br>-- <br>Best Regards, <br>G.E.Hari Prasath <br><br><br><br><br>