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Subjectkernel OOPS for XFS in xfs_iget_core (using NFS+SMP+MD)


I have seen some references to a similar bug in other kernel list
posts from October 2004 and am trying to figure out if this is the
same problem, or something new related to the xfs_iget_core patch
in 2.6.11. This seems to be a very hard to reproduce bug, but
we've seen this problem twice in a week of testing under Fedora
Core 3 on the following kernel:

Linux violet 2.6.10-1.741_FC3smp #1 SMP Thu Jan 13 16:53:16 EST 2005
i686 i686 i386 GNU/Linux

This is on a system with 4 3ware 8506-4 cards in a software-RAID-0
configuration to make one large volume. The first traceback was
triggered after 1 week of a production NFS load and the second
traceback was triggered after two hours of a load generated by
five NFS clients running nfs_fsstress.sh.

The two tracebacks are follow:


May 10 15:49:56 violet kernel: xfs_iget_core: ambiguous vns:
vp/0xee02202c, invp/0xe13dddd0
May 10 15:49:56 violet kernel: ------------[ cut here ]------------
May 10 15:49:56 violet kernel: kernel BUG at fs/xfs/support/debug.c:106!
May 10 15:49:56 violet kernel: invalid operand: 0000 [#1]
May 10 15:49:56 violet kernel: SMP
May 10 15:49:56 violet kernel: Modules linked in: nfs vfat fat nfsd
lockd md5 ipv6 parport_pc lp parport sunrpc xfs exportfs dm_mod video
button batter
y ac uhci_hcd hw_random i2c_i801 i2c_core e1000 bonding floppy ext3 jbd
raid0 3w_xxxx sd_mod scsi_mod
May 10 15:49:56 violet kernel: CPU: 1
May 10 15:49:56 violet kernel: EIP: 0060:[<f8aa660f>] Not tainted VLI
May 10 15:49:56 violet kernel: EFLAGS: 00010246 (2.6.11-1.14_FC3smp)
May 10 15:49:56 violet kernel: EIP is at cmn_err+0x98/0xa8 [xfs]
May 10 15:49:56 violet kernel: eax: 00000000 ebx: f8aa9a84 ecx:
f8abd364 edx: 00000000
May 10 15:49:56 violet kernel: esi: f8aa9304 edi: f8abe91e ebp:
00000000 esp: d77f4af0
May 10 15:49:56 violet kernel: ds: 007b es: 007b ss: 0068
May 10 15:49:56 violet kernel: Process nfsd (pid: 6303,
threadinfo=d77f4000 task=e7412aa0)
May 10 15:49:56 violet kernel: Stack: f8aa9304 f8aa92cb f8abe8e0
00000292 d77f4000 a1e0b035 00000000 f53891ac
May 10 15:49:56 violet kernel: f8a7932f 00000000 f8aa9a84
ee02202c e13dddd0 f7005200 f8aa4fe1 d82d0354
May 10 15:49:56 violet kernel: 000001e0 e13dddf4 d82d0350
00000000 cabd6400 e13dddd0 f53891ac e13dddf4
May 10 15:49:56 violet kernel: Call Trace:
May 10 15:49:56 violet kernel: [<f8a7932f>] xfs_iget_core+0x4f9/0x5e2 [xfs]
May 10 15:49:56 violet kernel: [<f8aa4fe1>]
linvfs_alloc_inode+0x20/0x2d [xfs]
May 10 15:49:56 violet kernel: [<f8a794ec>] xfs_iget+0xd4/0x16a [xfs]
May 10 15:49:56 violet kernel: [<f8a95193>] xfs_vget+0x61/0xce [xfs]
May 10 15:49:56 violet kernel: [<f8aa5b93>] vfs_vget+0x2d/0x30 [xfs]
May 10 15:49:56 violet kernel: [<f8a42341>] linvfs_get_dentry+0x3b/0x6f
[xfs]
May 10 15:49:56 violet kernel: [<f890302d>]
find_exported_dentry+0x2d/0x601 [exportfs]
May 10 15:49:56 violet kernel: [<f88ee45c>]
e1000_xmit_frame+0x554/0x8b3 [e1000]
May 10 15:49:56 violet kernel: [<c02a0fba>] __kfree_skb+0xab/0x155
May 10 15:49:56 violet kernel: [<f8a83425>]
xfs_log_release_iclog+0x11/0x3e [xfs]
May 10 15:49:56 violet kernel: [<c01cdd4e>] copy_to_user+0x4d/0x5f
May 10 15:49:56 violet kernel: [<c02a2b8a>] memcpy_toiovec+0x27/0x4c
May 10 15:49:56 violet kernel: [<c02a30f2>]
skb_copy_datagram_iovec+0x4d/0x1f7
May 10 15:49:56 violet kernel: [<c02a09a4>] release_sock+0x12/0x79
May 10 15:49:56 violet kernel: [<c02c8793>] tcp_recvmsg+0x2d5/0x738
May 10 15:49:56 violet kernel: [<c02a0ae5>] sock_common_recvmsg+0x41/0x57
May 10 15:49:56 violet kernel: [<c029d537>] sock_recvmsg+0x10c/0x127
May 10 15:49:56 violet kernel: [<c01727da>] d_instantiate+0x54/0x58
May 10 15:49:56 violet kernel: [<c011b6c4>] recalc_task_prio+0x8a/0x150
May 10 15:49:56 violet kernel: [<c011b814>] activate_task+0x8a/0x99
May 10 15:49:56 violet kernel: [<c011bce3>] try_to_wake_up+0x238/0x270
May 10 15:49:56 violet kernel: [<f8c08c57>]
svc_expkey_lookup+0x404/0x425 [nfsd]
May 10 15:49:56 violet kernel: [<f8c094cc>] exp_find_key+0x69/0x7e [nfsd]
May 10 15:49:56 violet kernel: [<f8a422ae>] linvfs_decode_fh+0x5e/0xb6
[xfs]
May 10 15:49:56 violet kernel: [<f8c03c10>] nfsd_acceptable+0x0/0xdd [nfsd]
May 10 15:49:56 violet kernel: [<f8a42250>] linvfs_decode_fh+0x0/0xb6 [xfs]
May 10 15:49:56 violet kernel: [<f8c03eb8>] fh_verify+0x1cb/0x578 [nfsd]
May 10 15:49:56 violet kernel: [<f8c03c10>] nfsd_acceptable+0x0/0xdd [nfsd]
May 10 15:49:56 violet kernel: [<c02ff57d>] schedule+0x33d/0xb11
May 10 15:49:56 violet kernel: [<f8c05b54>] nfsd_open+0x22/0x1bd [nfsd]
May 10 15:49:56 violet kernel: [<f8c0624a>] nfsd_write+0x31/0x316 [nfsd]
May 10 15:49:56 violet kernel: [<f89aa8b7>] ip_map_lookup+0x34c/0x397
[sunrpc]
May 10 15:49:57 violet kernel: [<f89aaad1>]
svcauth_unix_set_client+0xab/0xb2 [sunrpc]
May 10 15:49:57 violet kernel: [<c012997d>]
del_singleshot_timer_sync+0x8/0x27
May 10 15:49:57 violet kernel: [<c03005e1>] schedule_timeout+0x91/0xfd
May 10 15:49:57 violet kernel: [<f8c0caac>] nfsd3_proc_write+0xab/0x10a
[nfsd]
May 10 15:49:57 violet kernel: [<f8c0e4de>]
nfs3svc_decode_writeargs+0x0/0x175 [nfsd]
May 10 15:49:57 violet kernel: [<f8c02595>] nfsd_dispatch+0x80/0x1db [nfsd]
May 10 15:49:57 violet kernel: [<f89a9ef9>] svc_authenticate+0x79/0xb1
[sunrpc]
May 10 15:49:57 violet kernel: [<f89a7920>] svc_process+0x52e/0x60e
[sunrpc]
May 10 15:49:57 violet kernel: [<f8c0239a>] nfsd+0x185/0x300 [nfsd]
May 10 15:49:57 violet kernel: [<f8c02215>] nfsd+0x0/0x300 [nfsd]
May 10 15:49:57 violet kernel: [<c01022f9>] kernel_thread_helper+0x5/0xb
May 10 15:49:57 violet kernel: Code: f8 c7 44 24 08 e0 e8 ab f8 c7 04 24
04 93 aa f8 89 44 24 04 e8 a5 b2 67 c7 b8 64 d3 ab f8 8b 54 24 0c e8 9f
a8 85
c7 85 ed 75 08 <0f> 0b 6a 00 eb 92 aa f8 83 c4 10 5b 5e 5f 5d c3 55 89
c5 b8 07


May 12 19:42:01 violet kernel: xfs_iget_core: ambiguous vns:
vp/0xd710bc4c, invp/0xc400a7c0
May 12 19:42:01 violet kernel: ------------[ cut here ]------------
May 12 19:42:01 violet kernel: kernel BUG at fs/xfs/support/debug.c:106!
May 12 19:42:01 violet kernel: invalid operand: 0000 [#1]
May 12 19:42:01 violet kernel: SMP
May 12 19:42:01 violet kernel: Modules linked in: loop nfs nfsd lockd
md5 ipv6 parport_pc lp parport sunrpc xfs exportfs dm_mod video button
battery ac
uhci_hcd hw_random i2c_i801 i2c_core e1000 bonding floppy ext3 jbd
raid0 3w_xxxx sd_mod scsi_mod
May 12 19:42:01 violet kernel: CPU: 1
May 12 19:42:01 violet kernel: EIP: 0060:[<f8aa660f>] Not tainted VLI
May 12 19:42:01 violet kernel: EFLAGS: 00010246 (2.6.11-1.14_FC3smp)
May 12 19:42:01 violet kernel: EIP is at cmn_err+0x98/0xa8 [xfs]
May 12 19:42:01 violet kernel: eax: 00000000 ebx: f8aa9a84 ecx:
f8abd364 edx: 00000000
May 12 19:42:01 violet kernel: esi: f8aa9304 edi: f8abe91e ebp:
00000000 esp: f77adb5c
May 12 19:42:01 violet kernel: ds: 007b es: 007b ss: 0068
May 12 19:42:01 violet kernel: Process nfsd (pid: 4186,
threadinfo=f77ad000 task=f779f560)
May 12 19:42:01 violet kernel: Stack: f8aa9304 f8aa92cb f8abe8e0
00000296 f77ad000 20819027 00000000 e29c5aac
May 12 19:42:01 violet kernel: f8a7932f 00000000 f8aa9a84
d710bc4c c400a7c0 f67f7400 f8aa4fe1 f76d0274
May 12 19:42:01 violet kernel: 00000000 c400a7e4 f76d0270
00000000 f67ef000 c400a7c0 e29c5aac c400a7e4
May 12 19:42:01 violet kernel: Call Trace:
May 12 19:42:01 violet kernel: [<f8a7932f>] xfs_iget_core+0x4f9/0x5e2 [xfs]
May 12 19:42:01 violet kernel: [<f8aa4fe1>]
linvfs_alloc_inode+0x20/0x2d [xfs]
May 12 19:42:01 violet kernel: [<f8a794ec>] xfs_iget+0xd4/0x16a [xfs]
May 12 19:42:01 violet kernel: [<f8a95193>] xfs_vget+0x61/0xce [xfs]
May 12 19:42:01 violet kernel: [<c02a0fba>] __kfree_skb+0xab/0x155
May 12 19:42:01 violet kernel: [<f8aa5b93>] vfs_vget+0x2d/0x30 [xfs]
May 12 19:42:01 violet kernel: [<f8a42341>] linvfs_get_dentry+0x3b/0x6f
[xfs]
May 12 19:42:01 violet kernel: [<f88d902d>]
find_exported_dentry+0x2d/0x601 [exportfs]
May 12 19:42:01 violet kernel: [<c02a0fba>] __kfree_skb+0xab/0x155
May 12 19:42:01 violet kernel: [<c02a09a4>] release_sock+0x12/0x79
May 12 19:42:01 violet kernel: [<c02c8793>] tcp_recvmsg+0x2d5/0x738
May 12 19:42:01 violet kernel: [<c02a0ae5>] sock_common_recvmsg+0x41/0x57



processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.66GHz
stepping : 7
cpu MHz : 2666.116
cache size : 512 KB
physical id : 0
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips : 5275.64

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Xeon(TM) CPU 2.66GHz
stepping : 7
cpu MHz : 2666.116
cache size : 512 KB
physical id : 3
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips : 5324.80



PCI devices found:
Bus 0, device 0, function 0:
Class 0600: PCI device 8086:254c (rev 1).
Bus 0, device 0, function 1:
Class ff00: PCI device 8086:2541 (rev 1).
Bus 0, device 2, function 0:
Class 0604: PCI device 8086:2543 (rev 1).
Master Capable. Latency=64. Min Gnt=4.
Bus 0, device 3, function 0:
Class 0604: PCI device 8086:2545 (rev 1).
Master Capable. Latency=64. Min Gnt=4.
Bus 0, device 29, function 0:
Class 0c03: PCI device 8086:2482 (rev 2).
IRQ 225.
I/O at 0x2000 [0x201f].
Bus 0, device 29, function 1:
Class 0c03: PCI device 8086:2484 (rev 2).
IRQ 233.
I/O at 0x2020 [0x203f].
Bus 0, device 29, function 2:
Class 0c03: PCI device 8086:2487 (rev 2).
IRQ 169.
I/O at 0x2040 [0x205f].
Bus 0, device 30, function 0:
Class 0604: PCI device 8086:244e (rev 66).
Master Capable. No bursts. Min Gnt=12.
Bus 0, device 31, function 0:
Class 0601: PCI device 8086:2480 (rev 2).
Bus 0, device 31, function 1:
Class 0101: PCI device 8086:248b (rev 2).
IRQ 169.
I/O at 0x2060 [0x206f].
Non-prefetchable 32 bit memory at 0xf8000000 [0xf80003ff].
Bus 0, device 31, function 3:
Class 0c05: PCI device 8086:2483 (rev 2).
I/O at 0x1100 [0x111f].
Bus 1, device 28, function 0:
Class 0800: PCI device 8086:1461 (rev 4).
Non-prefetchable 32 bit memory at 0xf9100000 [0xf9100fff].
Bus 1, device 30, function 0:
Class 0800: PCI device 8086:1461 (rev 4).
Non-prefetchable 32 bit memory at 0xf9101000 [0xf9101fff].
Bus 4, device 28, function 0:
Class 0800: PCI device 8086:1461 (rev 4).
Non-prefetchable 32 bit memory at 0xfa000000 [0xfa000fff].
Bus 4, device 30, function 0:
Class 0800: PCI device 8086:1461 (rev 4).
Non-prefetchable 32 bit memory at 0xfa001000 [0xfa001fff].
Bus 1, device 29, function 0:
Class 0604: PCI device 8086:1460 (rev 4).
Master Capable. Latency=64. Min Gnt=4.
Bus 1, device 31, function 0:
Class 0604: PCI device 8086:1460 (rev 4).
Master Capable. Latency=64. Min Gnt=4.
Bus 4, device 29, function 0:
Class 0604: PCI device 8086:1460 (rev 4).
Master Capable. Latency=64. Min Gnt=4.
Bus 4, device 31, function 0:
Class 0604: PCI device 8086:1460 (rev 4).
Master Capable. Latency=64. Min Gnt=4.
Bus 3, device 1, function 0:
Class 0104: PCI device 13c1:1001 (rev 1).
IRQ 177.
Master Capable. Latency=72. Min Gnt=9.
I/O at 0x3080 [0x308f].
Non-prefetchable 32 bit memory at 0xf9240000 [0xf924000f].
Non-prefetchable 32 bit memory at 0xf9800000 [0xf9ffffff].
Bus 5, device 1, function 0:
Class 0104: PCI device 13c1:1001 (rev 1).
IRQ 185.
Master Capable. Latency=72. Min Gnt=9.
I/O at 0x4000 [0x400f].
Non-prefetchable 32 bit memory at 0xfa100000 [0xfa10000f].
Non-prefetchable 32 bit memory at 0xfa800000 [0xfaffffff].
Bus 5, device 3, function 0:
Class 0104: PCI device 13c1:1001 (rev 1).
IRQ 193.
Master Capable. Latency=72. Min Gnt=9.
I/O at 0x4010 [0x401f].
Non-prefetchable 32 bit memory at 0xfa100400 [0xfa10040f].
Non-prefetchable 32 bit memory at 0xfb000000 [0xfb7fffff].
Bus 6, device 1, function 0:
Class 0104: PCI device 13c1:1001 (rev 1).
IRQ 201.
Master Capable. Latency=72. Min Gnt=9.
I/O at 0x5000 [0x500f].
Non-prefetchable 32 bit memory at 0xfc000000 [0xfc00000f].
Non-prefetchable 32 bit memory at 0xfb800000 [0xfbffffff].
Bus 3, device 2, function 0:
Class 0200: PCI device 8086:1010 (rev 1).
IRQ 209.
Master Capable. Latency=64. Min Gnt=255.
Non-prefetchable 64 bit memory at 0xf9200000 [0xf921ffff].
I/O at 0x3000 [0x303f].
Bus 3, device 2, function 1:
Class 0200: PCI device 8086:1010 (rev 1).
IRQ 217.
Master Capable. Latency=64. Min Gnt=255.
Non-prefetchable 64 bit memory at 0xf9220000 [0xf923ffff].
I/O at 0x3040 [0x307f].
Bus 7, device 1, function 0:
Class 0300: PCI device 1002:4752 (rev 39).
IRQ 11.
Master Capable. Latency=64. Min Gnt=8.
Non-prefetchable 32 bit memory at 0xfd000000 [0xfdffffff].
I/O at 0x6000 [0x60ff].
Non-prefetchable 32 bit memory at 0xfc100000 [0xfc100fff].

I would appreciate any information you can offer.

Greg Brauer
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