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Date:	Tue, 22 Jan 2008 12:38:52 +0100
From:	BERTRAND Joël <joel.bertrand@...tella.fr>
To:	linux-raid@...r.kernel.org
CC:	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Raid1, mdadm and nfs that remains in D state

	Hello,

	I have installed a lot of T1000 with debian/testing and official 
2.6.23.9 linux kernel. All but iscsi packages come from debian 
repositories. iscsi was built from SVN tree. md7 is a raid1 volume over 
iscsi and I can access to this device. This morning, one of my T1000 has 
crashed. NFS daemon stays in D state:

Root gershwin:[~] > ps auwx | grep NFS
root     17041  0.0  0.0   2064   744 ttyS0    S+   12:33   0:00 grep NFS
Root gershwin:[~] > ps auwx | grep nfs
root     17043  0.0  0.0   2064   744 ttyS0    S+   12:33   0:00 grep nfs
root     18276  0.0  0.0      0     0 ?        D     2007  16:59 [nfsd]
root     18277  0.0  0.0      0     0 ?        D     2007  16:56 [nfsd]
root     18278  0.0  0.0      0     0 ?        D     2007  16:57 [nfsd]
root     18279  0.0  0.0      0     0 ?        D     2007  16:41 [nfsd]
root     18280  0.0  0.0      0     0 ?        D     2007  16:44 [nfsd]
root     18281  0.0  0.0      0     0 ?        D     2007  16:49 [nfsd]
root     18282  0.0  0.0      0     0 ?        D     2007  16:37 [nfsd]
root     18283  0.0  0.0      0     0 ?        D     2007  16:54 [nfsd]
Root gershwin:[~] > dmesg
sp: fffff800f2bcf3b1 ret_pc: 00000000005e6d54
RPC: <raid1d+0x35c/0x1020>
l0: fffff80060b8fa40 l1: 0000000000000050 l2: 0000000000000006 l3: 
0000000000000001
l4: fffff800fde2c8a0 l5: fffff800fc74dc20 l6: 0000000000000007 l7: 
0000000000000000
i0: fffff800fb70c400 i1: fffff800fde2c8c8 i2: fffff8006297ee40 i3: 
fffff80000000000
i4: 0000000000000010 i5: 00000000007a2f00 i6: fffff800f2bcf4f1 i7: 
00000000005f2f50
I7: <md_thread+0x38/0x140>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000000080001600 TPC: 000000000055bff0 TNPC: 000000000055bff4 Y: 
00000000    Not tainted
TPC: <loop+0x14/0x28>
g0: 0000000000000020 g1: dffd574080000000 g2: 0002a8ba2e810000 g3: 
0000000000000000
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
0000000000000000
o0: fffff8009d13d254 o1: fffff80071755254 o2: 0000000000000dac o3: 
0000000000000000
o4: 000000000018d1a6 o5: 0000000000225c52 sp: fffff800f2bcf3b1 ret_pc: 
00000000005e6d54
RPC: <raid1d+0x35c/0x1020>
l0: fffff80077d36ce0 l1: 0000000000000050 l2: 0000000000000006 l3: 
0000000000000001
l4: fffff800fde2c8a0 l5: fffff800f4372ea0 l6: 0000000000000007 l7: 
0000000000000000
i0: fffff800fb70c400 i1: fffff800fde2c8c8 i2: fffff80091038660 i3: 
fffff80000000000
i4: 0000000000000010 i5: 00000000007a2f00 i6: fffff800f2bcf4f1 i7: 
00000000005f2f50
I7: <md_thread+0x38/0x140>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000004480001607 TPC: 00000000006803a0 TNPC: 00000000006803a4 Y: 
00000000    Not tainted
TPC: <_spin_unlock_irqrestore+0x28/0x40>
g0: fffff800fed95000 g1: 0000000000000000 g2: c000000000002000 g3: 
d000000000002000
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
fffff800ffcb0000
o0: fffff800fee16000 o1: 0000000000000000 o2: 0000000000000000 o3: 
fffff800fee16000
o4: 0000000000000000 o5: 0000000000784000 sp: fffff800f2bceda1 ret_pc: 
00000000005a4fb8
RPC: <tg3_poll+0x820/0xc40>
l0: 000000000000042a l1: 0000000000010000 l2: fffff800f79aba00 l3: 
00000000000001d0
l4: fffff800fed95700 l5: fffff800f1091ec0 l6: 00000000000001d0 l7: 
0000000000010000
i0: 0000000001df0000 i1: 0000000000000029 i2: 00000000000001df i3: 
0000000000000029
i4: fffff800fed95794 i5: 0000000094479812 i6: fffff800f2bcee81 i7: 
0000000000609780
I7: <net_rx_action+0x88/0x160>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000009980001602 TPC: 0000000010170100 TNPC: 0000000010170104 Y: 
00000000    Not tainted
TPC: <ipv4_get_l4proto+0x8/0xa0 [nf_conntrack_ipv4]>
g0: 000000001002bb58 g1: 000000000000006c g2: fffff800eba32b0c g3: 
0000000010170100
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
0000000000000003
o0: fffff800d69aae00 o1: 0000000000000000 o2: fffff800f2bced24 o3: 
fffff800f2bced2f
o4: fffff800fed95000 o5: fffff800f2bceec8 sp: fffff800f2bce411 ret_pc: 
0000000010019d7c
RPC: <nf_conntrack_in+0xa4/0x580 [nf_conntrack]>
l0: 0000000000000002 l1: 0000000010175590 l2: ffffffff80000000 l3: 
0000000000000002
l4: 000000000000ffff l5: 000000000cbcc8bb l6: 0000000000000002 l7: 
fffff80062b8f820
i0: 0000000000000002 i1: 0000000000000003 i2: fffff800f2bcf080 i3: 
fffff800fed95000
i4: 0000000000630260 i5: 0000000000630260 i6: fffff800f2bce541 i7: 
000000000062517c
I7: <nf_iterate+0x84/0xe0>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000004480001605 TPC: 0000000010161030 TNPC: 0000000010161034 Y: 
00000000    Not tainted
TPC: <ipt_do_table+0xd8/0x5a0 [ip_tables]>
g0: 0000000000010000 g1: 0000000000000000 g2: 00000000c0a80001 g3: 
0000000000000000
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
0000000000000be0
o0: 0000000010180b74 o1: fffff800f2bcf480 o2: 0000000000000000 o3: 
fffff800fed95000
o4: 0000000000000000 o5: fffff8005ef72be0 sp: fffff800f2bce821 ret_pc: 
0000000010160fac
RPC: <ipt_do_table+0x54/0x5a0 [ip_tables]>
l0: fffff8005ef72be0 l1: 000000000062c460 l2: ffffffff80000000 l3: 
fffff800688d7820
l4: fffff8005ef72000 l5: fffff800fda0c280 l6: fffff800fed95000 l7: 
0000000010164800
i0: fffff800f2bcf480 i1: 0000000000000001 i2: fffff800fed95000 i3: 
0000000000000000
i4: 0000000010180b74 i5: 0000000000000000 i6: fffff800f2bce991 i7: 
000000000062517c
I7: <nf_iterate+0x84/0xe0>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000004480001607 TPC: 00000000006803a0 TNPC: 00000000006803a4 Y: 
00000000    Not tainted
TPC: <_spin_unlock_irqrestore+0x28/0x40>
g0: 0000000000002000 g1: 0000000000000000 g2: 0000000000200db0 g3: 
0000000000201db0
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
fffff800ffcb0000
o0: fffff800fee16000 o1: 0000000000000000 o2: 0000000000000000 o3: 
fffff800fee16000
o4: 0000000000000010 o5: 0000000000784000 sp: fffff800f2bceda1 ret_pc: 
00000000005a4844
RPC: <tg3_poll+0xac/0xc40>
l0: 00000000000000f2 l1: fffff800fe923a60 l2: 0000000000000f20 l3: 
fffff800f447b000
l4: fffff800fed95700 l5: 00000000000000f3 l6: 0000000000726c00 l7: 
0000000000000000
i0: fffff800fed95000 i1: fffff800f2bcf73c i2: 0000000000001976 i3: 
000000000074cc00
i4: 0000000000784000 i5: 0000000000784000 i6: fffff800f2bcee81 i7: 
0000000000609780
I7: <net_rx_action+0x88/0x160>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000000080001600 TPC: 000000000055bfe8 TNPC: 000000000055bfec Y: 
00000000    Not tainted
TPC: <loop+0xc/0x28>
g0: 0000000000000020 g1: 5ffb6cea80000000 g2: 0004930c59d50000 g3: 
0000000000000000
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
0000000000000000
o0: fffff800cad755e3 o1: fffff800c32e55e3 o2: 0000000000000a1d o3: 
0000000000000000
o4: 00000000002ab21e o5: 00000000002c5f16 sp: fffff800f2bcf3b1 ret_pc: 
00000000005e6d54
RPC: <raid1d+0x35c/0x1020>
l0: fffff800e30a6460 l1: 0000000000000030 l2: 0000000000000004 l3: 
0000000000000001
l4: fffff800fde2c8a0 l5: fffff800dfefbbc0 l6: 0000000000000007 l7: 
0000000000000000
i0: fffff800fb70c400 i1: fffff800fde2c8c8 i2: fffff800624536c0 i3: 
fffff80000000000
i4: 0000000000000010 i5: 00000000007a2f00 i6: fffff800f2bcf4f1 i7: 
00000000005f2f50
I7: <md_thread+0x38/0x140>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000000080001600 TPC: 000000001014e0ac TNPC: 000000001014dea8 Y: 
00000000    Not tainted
TPC: <iscsi_tcp_data_recv+0x514/0x1400 [iscsi_tcp]>
g0: 0000000000002000 g1: 0000000000000b20 g2: 00000000000014e0 g3: 
0000000000000b20
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
00000000000005a8
o0: 0000000000000000 o1: 0000000000000000 o2: fffff8006563e578 o3: 
0000000000000000
o4: 0000000000000578 o5: 0000000000000b20 sp: fffff800f2bce611 ret_pc: 
000000001014e030
RPC: <iscsi_tcp_data_recv+0x498/0x1400 [iscsi_tcp]>
l0: 00000000000005a8 l1: fffff800f6770b38 l2: fffff800ebfaca88 l3: 
fffff800f6770ae0
l4: 0000000000002000 l5: 0000000000000000 l6: 0000000000000006 l7: 
0000000000000000
i0: fffff800f50e2cc0 i1: fffff800952c1990 i2: fffff800f50e2cc0 i3: 
00000000000005a8
i4: fffff800f6770b38 i5: fffff80065f22260 i6: fffff800f2bce741 i7: 
000000000063ab58
I7: <tcp_read_sock+0x140/0x1c0>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000009980001602 TPC: 0000000000625400 TNPC: 0000000000625404 Y: 
00000000    Not tainted
TPC: <nf_hook_slow+0x48/0x100>
g0: fffff800fe550098 g1: 000000000000fc00 g2: 0000000000000100 g3: 
000007ff002ecc1f
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
0000000000000000
o0: fffff80063934800 o1: fffff800fed95000 o2: 0000000000000000 o3: 
fffff800fed95000
o4: 0000000000000000 o5: 0000000098e3a812 sp: fffff800f2bceb21 ret_pc: 
0000000000606da4
RPC: <netif_receive_skb+0x1ec/0x480>
l0: 0000000000759830 l1: 0000000000000000 l2: ffffffff80000000 l3: 
fffff800f2bcf3e8
l4: 000000000000ffff l5: fffff8006ebff940 l6: 00000000000000a5 l7: 
0000000000010000
i0: 0000000000000002 i1: 0000000000000000 i2: fffff800f2bcf560 i3: 
fffff800fed95000
i4: 0000000000000000 i5: 000000000062c060 i6: fffff800f2bcec01 i7: 
000000000062cca4
I7: <ip_rcv+0x3ac/0x6e0>
BUG: soft lockup - CPU#6 stuck for 11s! [md7_raid1:5818]
TSTATE: 0000000080001600 TPC: 000000000055bff0 TNPC: 000000000055bff4 Y: 
00000000    Not tainted
TPC: <loop+0x14/0x28>
g0: 0000000000000020 g1: ffff6f2800000000 g2: 000090d6de500000 g3: 
0000000000000000
g4: fffff800fd52d960 g5: fffff800020bc000 g6: fffff800f2bcc000 g7: 
0000000000000000
o0: fffff800dc397a50 o1: fffff80018241a50 o2: 00000000000005b0 o3: 
0000000000000000
o4: 00000000000547e0 o5: 0000000000302c8d sp: fffff800f2bcf3b1 ret_pc: 
00000000005e6d54
RPC: <raid1d+0x35c/0x1020>

	I will tre to build a 2.6.23.14 kernel but I don't see any patch that 
could fix this bug. This bug always occurs when mdadm rescan this 
device, but I don't understand why nfs remains in D state. Any idea ?

	Regards,

	JKB
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