Hello,
I run 2.6.23 linux kernel on two T1000 (sparc64) servers. Each server
has a partitionable raid5 array (/dev/md/d0) and I have to synchronize
both raid5 volumes by raid1. Thus, I have tried to build a raid1 volume
between /dev/md/d0p1 and /dev/sdi1 (exported by iscsi from the second
server) and I obtain a BUG :
Root gershwin:[/usr/scripts] > mdadm -C /dev/md7 -l1 -n2 /dev/md/d0p1
/dev/sdi1
...
kernel BUG at drivers/md/raid5.c:380!
\|/ ____ \|/
"@'/ .. \`@"
/_| \__/ |_\
\__U_/
md7_resync(4476): Kernel bad sw trap 5 [#1]
TSTATE: 0000000080001606 TPC: 00000000005ed50c TNPC: 00000000005ed510 Y:
00000000 Not tainted
TPC: <get_stripe_work+0x1f4/0x200>
g0: 0000000000000005 g1: 00000000007c0400 g2: 0000000000000001 g3:
0000000000748400
g4: fffff800ebdb2400 g5: fffff80002080000 g6: fffff800e82fc000 g7:
0000000000748528
o0: 0000000000000029 o1: 0000000000715798 o2: 000000000000017c o3:
0000000000000005
o4: 0000000000000006 o5: fffff800e9bb6e28 sp: fffff800e82fed81 ret_pc:
00000000005ed504
RPC: <get_stripe_work+0x1ec/0x200>
l0: 0000000000000002 l1: ffffffffffffffff l2: fffff800e9bb6e68 l3:
fffff800e9bb6db0
l4: fffff800e9bb6e50 l5: fffffffffffffff8 l6: 0000000000000005 l7:
fffff800fcbd6000
i0: fffff800e9bb6df0 i1: 0000000000000000 i2: 0000000000000004 i3:
fffff800e82ff720
i4: 0000000000000080 i5: 0000000000000080 i6: fffff800e82fee51 i7:
00000000005f0274
I7: <handle_stripe5+0x4fc/0x1340>
Caller[00000000005f0274]: handle_stripe5+0x4fc/0x1340
Caller[00000000005f211c]: handle_stripe+0x24/0x13e0
Caller[00000000005f4450]: make_request+0x358/0x600
Caller[0000000000542890]: generic_make_request+0x198/0x220
Caller[00000000005eb240]: sync_request+0x608/0x640
Caller[00000000005fef7c]: md_do_sync+0x384/0x920
Caller[00000000005ff8f0]: md_thread+0x38/0x140
Caller[0000000000478b40]: kthread+0x48/0x80
Caller[00000000004273d0]: kernel_thread+0x38/0x60
Caller[0000000000478de0]: kthreadd+0x148/0x1c0
Instruction DUMP: 9210217c 7ff8f57f 90122398 <91d02005> 30680004
01000000 01000000 01000000 9de3bf00
Root gershwin:[/usr/scripts] > cat /proc/mdstat
Personalities : [raid1] [raid6] [raid5] [raid4]
md7 : active raid1 sdi1[1] md_d0p1[0]
1464725632 blocks [2/2] [UU]
[>....................] resync = 0.0% (132600/1464725632)
finish=141823.7min speed=171K/sec
md_d0 : active raid5 sdc1[0] sdh1[5] sdg1[4] sdf1[3] sde1[2] sdd1[1]
1464725760 blocks level 5, 64k chunk, algorithm 2 [6/6] [UUUUUU]
...
Root gershwin:[/usr/scripts] > fdisk -l /dev/md/d0
Disk /dev/md/d0: 1499.8 GB, 1499879178240 bytes
2 heads, 4 sectors/track, 366181440 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk identifier: 0xa4a52979
Device Boot Start End Blocks Id System
/dev/md/d0p1 1 366181440 1464725758 fd Linux raid
autodetect
Root gershwin:[/usr/scripts] > fdisk -l /dev/sdi
Disk /dev/sdi: 1499.8 GB, 1499879178240 bytes
2 heads, 4 sectors/track, 366181440 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk identifier: 0xf6cdb2a3
Device Boot Start End Blocks Id System
/dev/sdi1 1 366181440 1464725758 fd Linux raid
autodetect
Root gershwin:[/usr/scripts] > cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: FUJITSU Model: MAY2073RCSUN72G Rev: 0501
Type: Direct-Access ANSI SCSI revision: 04
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: FUJITSU Model: MAY2073RCSUN72G Rev: 0501
Type: Direct-Access ANSI SCSI revision: 04
Host: scsi2 Channel: 00 Id: 08 Lun: 00
Vendor: FUJITSU Model: MAW3300NC Rev: 0104
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 09 Lun: 00
Vendor: FUJITSU Model: MAW3300NC Rev: 0104
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 10 Lun: 00
Vendor: FUJITSU Model: MAW3300NC Rev: 0104
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 11 Lun: 00
Vendor: FUJITSU Model: MAW3300NC Rev: 0104
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 12 Lun: 00
Vendor: FUJITSU Model: MAW3300NC Rev: 0104
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 13 Lun: 00
Vendor: FUJITSU Model: MAW3300NC Rev: 0104
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi3 Channel: 00 Id: 00 Lun: 00
Vendor: IET Model: VIRTUAL-DISK Rev: 0
Type: Direct-Access ANSI SCSI revision: 04
Root gershwin:[/usr/scripts] >
I don't think if this bug is arch specific, but I never see it on amd64...
Regards,
JKB
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