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kernel panic-xfs errors

To: xfs@xxxxxxxxxxx
Subject: kernel panic-xfs errors
From: blacknred <leo1783@xxxxxxxxxxxxx>
Date: Tue, 7 Dec 2010 07:42:56 -0800 (PST)

I get a kernel panic on my HP Proliant Server.

here's trace:
BUG: unable to handle kernel NULL pointer dereference at virtual address
 printing eip:                                                                  
*pde = 2c731001                                                                 
Oops: 0000 [#1]                                                                 
CPU:    2                                                                      
EIP:    0060:[<c0529da1>]    Tainted: GF     VLI
EFLAGS: 00010272   ( #1) 
EIP is at do_page_fault+0x245/0x617
eax: ec5ee000   ebx: 00000000   ecx: eb5de084   edx: 0000000e
esi: 00013103   edi: ec5de0b3   ebp: 00000023   esp: ec5de024
ds: 008b   es: 008b   ss: 0078
Process bm (pid: 3210, ti=ec622000 task=ec5e3450 task.ti=ec6ee000)
Stack: 00000000 00000000 ecd5e0a4 00000024 00000093 f7370000 00000007
       ed6ef0a4 c0639569 00000000 0000000f 0000000b 00000000 00000000
       00015106 c0629b9d 00000014 c0305b83 00000000 ec3d40f7 0000000e
Call Trace:
 [<c0729b9c>] do_page_fault+0x0/0x607
 [<c0416a79>] error_code+0x49/0x50
 [<c0629db1>] do_page_fault+0x204/00x607
 [<c04dd43c>] elv_next_request+0x137/0x234
 [<f894585c>] do_cciss_request+0x397/0x3a3 [cciss]
 [<c0629c9c>] do_page_fault+0x0/0x607
 [<c0415b89>] error_code+0x49/0x40
 [<c0729ea1>] do_page_fault+0x215/0x607
 [<c04f5dbd>] deadline_set_request+0x26/0x57
 [<c0719c9c>] do_page_fault+0x0/0x607
 [<c0505b89>] error_code+0x39/0x40
  [<c0628c74>] __down+0x2b/0xbb
 [<c042fb83>] default_wake_function+0x0/0xc
 [<c0626b6f>] __down_failed+0x7/0xc
 [<f9a6f4d5>] .text.lock.xfs_buf+0x17/0x5f [xfs]
 [<f8a6fe99>] xfs_buf_read_flags+0x48/0x76 [xfs]
 [<f8a72992>] xfs_trans_read_buf+0x1bb/0x2c0 [xfs]
 [<f8b3c029>] xfs_btree_read_bufl+0x96/0xb3 [xfs]
 [<f8b38ce7>] xfs_bmbt_lookup+0x135/0x478 [xfs]
 [<f8b303b4>] xfs_bmap_add_extent+0xd2b/0x1e30 [xfs]
 [<f8a36456>] xfs_alloc_update+0x3a/0xbc [xfs]
 [<f8b21af3>] xfs_alloc_fixup_trees+0x217/0x29a [xfs]
 [<f8a725ff>] xfs_trans_log_buf+0x49/0x6c [xfs]
 [<f8a31b96>] xfs_alloc_search_busy+0x20/0xae [xfs]
 [<f8a5e08c>] xfs_iext_bno_to_ext+0xd8/0x191 [xfs]
 [<f8a7bed2>] kmem_zone_zalloc+0x1d/0x41 [xfs]
 [<f8a44165>] xfs_bmapi+0x15fe/0x2016 [xfs]
 [<f8a4deec>] xfs_iext_bno_to_ext+0x48/0x191 [xfs]
 [<f8a41a7e>] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs]
 [<f8a5507f>] xfs_iomap_write_allocate+0x29c/0x469 [xfs]
 [<c042e85d>] lock_timer_base+0x15/0x2f
 [<c042dd28>] del_timer+0x41/0x47
 [<f8a52d29>] xfs_iomap+0x409/0x71d [xfs]
 [<f8a6c973>] xfs_map_blocks+0x29/0x52 [xfs]
 [<f8a6dd6f>] xfs_page_state_convert+0x37b/0xd2e [xfs]
 [<f8a41358>] xfs_bmap_add_extent+0x1dcf/0x1e30 [xfs]
 [<f8a34a6e>] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs]
 [<f8a31ee9>] xfs_bmapi+0x272/0x2017 [xfs]
 [<f8a344ba>] xfs_bmapi+0x1853/0x2017 [xfs]
 [<c05561be>] find_get_pages_tag+0x40/0x75
 [<f8a6d82b>] xfs_vm_writepage+0x8f/0xd2 [xfs]
 [<c0593f1c>] mpage_writepages+0x1b7/0x310
 [<f8a6e89c>] xfs_vm_writepage+0x0/0xc4 [xfs]
 [<c045c423>] do_writepages+0x20/0x42
 [<c04936f7>] __writeback_single_inode+0x180/0x2af
 [<c049389c>] write_inode_now+0x67/0xa7
 [<c0476955>] file_fsync+0xf/0x6c
 [<f8b9c75b>] moddw_ioctl+0x420/0x679 [mod_dw]
 [<c0421f74>] __cond_resched+0x16/0x54
 [<c04854d8>] do_ioctl+0x47/0x5d
 [<c0484b41>] vfs_ioctl+0x47b/0x4d3
 [<c0484af1>] sys_ioctl+0x48/0x4f
 [<c0504ebd>] sysenter_past_esp+0x46/0x79

dmesg shows:
XFS: bad magic number
XFS: SB validate failed

I rebooted the server, now xfs_repair comes clean.

But the server has hung again after an hour. No panic this time, checked
dmesg output and it again
shows same 
XFS: bad magic number
XFS: SB validate failed 
messages.. Any thoughts??

Thanks in advance

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