Hi, I got the following exception on a 128-way PPC64 machine while running ebizzy-0.2 benchmark. cpu 0x48: Vector: 200 (Machine Check) at [c000006df1bb37c0] pc: c00000000007a26c: .exit_robust_list+0x78/0x228 lr: c00000000007a240: .exit_robust_list+0x4c/0x228 sp: c000006df1bb3a40 msr: 8000000000109032 current = 0xc000006df1725120 paca = 0xc0000000006f4000 pid = 5950, comm = ebizzy cpu 0x78: Vector: 200 (Machine Check) at [c000000e21bd37c0] pc: c00000000007a26c: .exit_robust_list+0x78/0x228 lr: c00000000007a240: .exit_robust_list+0x4c/0x228 sp: c000000e21bd3a40 msr: 8000000000109032 current = 0xc00e pa paca = 0xc0000000006fb800 cid pid = 5941, comm = ebizzy = 5941,[c000006df1bb3b10] c0000000000578a8 .do_exit+0x260/0x7fc [c000006df1bb3bc0] c000000000057ef8 .sys_exit_group+0x0/0x8 [c000006df1bb3c50] c0000000000636e0 .get_signal_to_deliver+0x45c/0x4ac [c000006df1bb3d00] c000000000011d44 .do_signal+0x68/0x2e4 [c000006df1bb3e30] c000000000008ae8 do_work+0x28/0x2c --- Exception: 500 (Hardware Interrupt) at 0000000010007698 SP (40016601610) is in userspace Config file attached. I did not see any similar failure reported with 2.6.24-rc1. --Vaidy