Kernel panic from EXT3 filesystem

[Ajit Narayanan]

Hi All,
 
I'm using FC3 with 2.6.9 SMP Kernel. The root file system is EXT3 and
the volume is a XFS volume. While doing IO over a NFS v3 share, with
'watch df' running in parallel, kernel panic at SLAB memory is noticed.
When searching Internet, I also noticed that similar KP are reported at
free_block function; but could not find fix for this.
 
For me, this issue appears intermittently. It happens when doing IO over
60 NFS shares.
 
>From the KP message it appears to be an issue in Linux SLAB memory
module. Can anyone suggest a solution for this issue?  Is this issue
already addressed in later kernel like 2.6.12?
 
------KP start------
kernel: Unable to handle kernel paging request at virtual address
49bec98e
kernel:  printing eip:
kernel: 02140b7c
kernel: *pde = 00000000
kernel: Oops: 0002 [#1]
kernel: SMP
kernel: Modules linked in: xfs i2c_i801 bccfg(U) dvm(U) sg st osst nfsd
exportfs lockd md5 ipv6 autofs4 i2c_dev i2c_core sunrpc iptable_filter
ip_tables dm_mod button battery ac sr_mod usb_storage uhci_hcd ehci_hcd
e1000 floppy ext3 jbd bcraid aic79xx sd_mod scsi_mod
kernel: CPU:    3
kernel: EIP:    0060:[<02140b7c>]    Tainted: PF  VLI
kernel: EFLAGS: 00010087   (2.6.9-1.667smp)
kernel: EIP is at free_block+0x62/0xd6
kernel: eax: 00000029   ebx: 41db3000   ecx: 03f1ccbb   edx: 00000000
kernel: esi: 41f6f280   edi: 0000003c   ebp: 00000011   esp: 3e384e10
kernel: ds: 007b   es: 007b   ss: 0068
kernel: Process atd (pid: 2831, threadinfo=3e384000 task=3e622930)
kernel: Stack: 41e0d010 39f19000 09fa4540 41e0d010 0000003c 02140c5e
41e0d000 41f6f280
kernel:        41e0d000 09fa4540 41e0d010 00000202 0214102d 09fa4548
00000000 3f1bb808
kernel:        2674d1e0 42d02886 2674d1e0 41f47e00 3d5b2320 3d11ce8c
42d0291e 1a7b8880
kernel: Call Trace:
kernel:  [<02140c5e>] cache_flusharray+0x6e/0x9c
kernel:  [<0214102d>] kfree+0x43/0x51
kernel:  [<42d02886>] free_rb_tree_fname+0x31/0x6c [ext3]
kernel:  [<42d0291e>] ext3_htree_free_dir_info+0x8/0x10 [ext3]
kernel:  [<42d02cd3>] ext3_release_dir+0xf/0x14 [ext3]
kernel:  [<021549ca>] __fput+0x55/0x100
kernel:  [<021536f4>] filp_close+0x59/0x5f
kernel:  [<02121350>] put_files_struct+0x57/0xc0
kernel:  [<02121f4e>] do_exit+0x227/0x3bd
kernel:  [<021221d2>] sys_exit_group+0x0/0xd
kernel:  [<021294f8>] get_signal_to_deliver+0x341/0x369
kernel:  [<02105e6c>] do_signal+0x55/0xd5
kernel:  [<0216396f>] filldir64+0x0/0x122
kernel:  [<0214f08a>] rw_vm+0x27e/0x28c
kernel:  [<0214f3a5>] put_user_size+0x29/0x2d
kernel:  [<02163b30>] sys_getdents64+0x9f/0xa9
kernel:  [<02105f14>] do_notify_resume+0x28/0x38
kernel: Code: 1c 8b 53 04 8b 03 89 50 04 89 02 31 d2 2b 4b 0c c7 03 00
01 10 00 c7 43 04 00 02 20 00 89 c8 f7 b6 b0 00 00 00 89 c1 0f b7 43 14
<66> 89 44 4b 18 8b 43 10 66 89 4b 14 48 85 c0 89 43 10 75 41 8b
------ KP End ------
 
 
Thanks in Advance
Srikumar
 
 
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