NMI Watchdog detected LOCKUP on CPU0, registers: CPU 0 Pid: 742, comm: md0_resync Not tainted 2.6.4-54.5-smp RIP: 0010:[<ffffffffa0098415>] <ffffffffa0098415>{:raid5:.text.lock.raid5+145} RSP: 0018:ffffffff804eaeb8 EFLAGS: 00000086 RAX: 00000101ff074640 RBX: 00000101ff074500 RCX: 0000000000000006 RDX: 0000000000000002 RSI: 0000000000001000 RDI: 00000101ff074500 RBP: 00000101ffc55880 R08: 0000000000000001 R09: 0000010010362c40 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 00000101ffc55880 R14: 0000000000000000 R15: 0000010010283200 FS: 0000002a9588d6e0(0000) GS:ffffffff804e6d00(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000002a956fa1a0 CR3: 0000000000101000 CR4: 00000000000006e0
You snipped the interesting part - the backtrace. -Andi