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Kernel panic from EXT3 filesystem

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




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