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SubjectIO error and panic while doing iput(), kernel BUG at fs/inode.c:1165!
From
Hi,
I have been getting a panic while unmounting the ext3 filesystem
that is on a partition.

The block device is a raid device. When the power to the disk shelf is
lost we see a lot of IO errors in the dmesg. These are expected.

Our application then tries to unmount the filesystem that has been
created on a partition.

At the end of __blkdev_put() on the partition the same routine is
invoked in recursion on the whole disk.

Since the whole disk's i_state is already I_CLEAR the system panics.

Is this a known issue? Who release the reference to the whole device?
udev/hotplug handler?

I am running 2.6.23 kernel and did not see this problem on 2.6.12 kernel.

Kallol

g directory #2 offset 0
(E3)[1255107782.100033] Buffer I/O error on device dd_dg10p1, logical block 0
(E4)[1255107782.100120] lost page write due to I/O error on dd_dg10p1
(E2)[1255107782.100221] EXT3-fs error (device dd_dg10p1):
read_inode_bitmap: Cannot read inode bitmap - block_group = 3,
inode_bitmap = 99377
(E4)[1255107782.100462] WARNING: at fs/buffer.c:1154 mark_buffer_dirty()
(E4)[1255107782.100544]
(E4)[1255107782.100544] Call Trace:
(E4)[1255107782.100720] [<ffffffff802b2185>] mark_buffer_dirty+0xc5/0xd0
(E4)[1255107782.100803] [<ffffffff802e5bc7>] ext3_commit_super+0x57/0xa0
(E4)[1255107782.100881] [<ffffffff802e6064>] ext3_handle_error+0x54/0xe0
(E4)[1255107782.100959] [<ffffffff802e628d>] ext3_error+0xcd/0xe0
(E4)[1255107782.101039] [<ffffffff8034ff7e>] submit_bio+0x5e/0xe0
(E4)[1255107782.101118] [<ffffffff802b2f35>] submit_bh+0xf5/0x130
(E4)[1255107782.101231] [<ffffffff802dbae6>] read_inode_bitmap+0x86/0x90
(E4)[1255107782.101340] [<ffffffff802dc1fa>] ext3_new_inode+0x46a/0xac0
(E4)[1255107782.101421] [<ffffffff802e374e>] ext3_create+0x6e/0x100
(E4)[1255107782.101499] [<ffffffff802983dc>] vfs_create+0xac/0xf0
(E4)[1255107782.101574] [<ffffffff80298c47>] open_namei+0x617/0x680
(E4)[1255107782.101653] [<ffffffff8028d7bc>] do_filp_open+0x1c/0x50
(E4)[1255107782.101733] [<ffffffff8028d94f>] get_unused_fd_flags+0x3f/0x120
(E4)[1255107782.101809] [<ffffffff8028db9a>] do_sys_open+0x5a/0xf0
(E4)[1255107782.101885] [<ffffffff8020beb2>] system_call+0x82/0x87
(E4)[1255107782.101962]
(E3)[1255107782.102036] Buffer I/O error on device dd_dg10p1, logical block 0
(E4)[1255107782.102143] lost page write due to I/O error on dd_dg10p1
(E2)[1255107782.102251] EXT3-fs error (device dd_dg10p1) in
ext3_new_inode: IO failure
(E3)[1255107782.102342] Buffer I/O error on device dd_dg10p1, logical block 0
(E4)[1255107782.102419] lost page write due to I/O error on dd_dg10p1
(E2)[1255107782.106154] EXT3-fs error (device dd_dg10p3):
ext3_find_entry: reading directory #2 offset 0
(E3)[1255107782.106402] Buffer I/O error on device dd_dg10p3, logical block 0
(E4)[1255107782.106487] lost page write due to I/O error on dd_dg10p3
(E2)[1255107782.106589] EXT3-fs error (device dd_dg10p3):
read_inode_bitmap: Cannot read inode bitmap - block_group = 3,
inode_bitmap = 99377
(E3)[1255107782.106867] Buffer I/O error on device dd_dg10p3, logical

....................
.....................
(E0)[1255107782.258305] ------------[ cut here ]------------
(E2)[1255107782.322915] kernel BUG at fs/inode.c:1165!
(U0)(MSG-KERN-00005):[1255107782.381327] invalid opcode: 0000 [1] SMP
(E4)[1255107782.456956] CPU 10
(E4)[1255107782.491713] Modules linked in: msr mptctl ipmi_watchdog
ipmi_si ipmi_devintf ipmi_msghandler ipv6 dd_iosched(P) usbkbd usbhid
uhci_hcd ehci_hcd i2c_i801 i2c_core 8021q t3_tom toecore cxgb3 usbcore
dd_raid_driver(P) e1000e qla2xxx firmware_class scsi_transport_fc
dm_round_robin dm_emc dm_mpath_rdac dm_multipath dm_mod scsi_dump
diskdump elog mptsas mptscsih mptbase sg dd_qoskcm(P)
(E4)[1255107782.912981] Pid: 24783, comm: umount Tainted: P
2.6.23-ddr133064 #1
(E4)[1255107783.004615] RIP: 0010:[<ffffffff802a2f92>]
[<ffffffff802a2f92>] iput+0x72/0x80
(E4)[1255107783.101728] RSP: 0018:ffff8107e36f9df8 EFLAGS: 00010246
(E4)[1255107783.174675] RAX: ffffffff804e7b40 RBX: ffff811029162188
RCX: ffff81105e5ea300
(E4)[1255107783.269410] RDX: ffff810820b68820 RSI: 0000000000000001
RDI: ffff811029162188
(E4)[1255107783.364185] RBP: ffff8110291620c0 R08: 0000000000000000
R09: 0000000000000001
(E4)[1255107783.458956] R10: 0000000000000000 R11: ffffffff802b6d10
R12: 0000000000000000
(E4)[1255107783.553760] R13: ffff8110291620d8 R14: 0000000000000000
R15: ffff811029162188
(E4)[1255107783.648604] FS: 00002b8099549f80(0000)
GS:ffff811037fae0c0(0000) knlGS:0000000000000000
(E4)[1255107783.754854] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
(E4)[1255107783.833014] CR2: 00002b809936716c CR3: 00000007fa6b1000
CR4: 00000000000006e0
(E4)[1255107783.927814] DR0: 0000000000000000 DR1: 0000000000000000
DR2: 0000000000000000
(E4)[1255107784.022652] DR3: 0000000000000000 DR6: 00000000ffff0ff0
DR7: 0000000000000400
(E4)[1255107784.117494] Process umount (pid: 24783, threadinfo
ffff8107e36f8000, task ffff810820b68820)
(E4)[1255107784.226857] Stack: 0000000000000001 ffffffff802b77f1
0000000017a8cf40 ffffffff88274780
(E4)[1255107784.333431] ffff810817a8cc80 ffff810810cadc00
ffff810817a8cc98 ffff8110291620c0
(E4)[1255107784.432516] ffff810817a8cd48 ffffffff802b7803
0000000080610680 ffff810817114800
(E4)[1255107784.529221] Call Trace:
(E4)[1255107784.570325] [<ffffffff802b77f1>] __blkdev_put+0x91/0x190
(E4)[1255107784.644300] [<ffffffff802b7803>] __blkdev_put+0xa3/0x190
(E4)[1255107784.718282] [<ffffffff8028fbe3>] deactivate_super+0x63/0x90
(E4)[1255107784.795376] [<ffffffff802a655e>] sys_umount+0x6e/0x280
(E4)[1255107784.867282] [<ffffffff80291f67>] sys_newstat+0x27/0x70
(E4)[1255107784.939183] [<ffffffff8027553e>] do_munmap+0x26e/0x310
(E4)[1255107785.011087] [<ffffffff8036d371>] __up_write+0x31/0x150
(E4)[1255107785.082985] [<ffffffff8020beb2>] system_call+0x82/0x87
(E4)[1255107785.154883]
(E4)[1255107785.182193]
(E4)[1255107785.182193] Code: 0f 0b eb fe 66 66 66 90 66 66 90 66 66
90 48 83 ec 08 48 8b
(U1)(MSG-KERN-00005):[1255107785.310184] RIP [<ffffffff802a2f92>]
iput+0x72/0x80
(E4)[1255107785.397005] RSP <ffff8107e36f9df8>


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