Avi Kivity wrote: > Avi Kivity wrote: >> >> I suggest checking if you have the latest BIOS update applied. I've >> had bad experiences with un-updated processors. >> > > FWIW, I have an 8-way F9 guest (2.6.27.5-blah) running on an 2x4 > Barcelona host, happily make -j16ing an allmodconfig kernel. Strange. I started the tests again with an updated BIOS now, installing an Intel machine to test on in parallel. old: # ./rdmsr /dev/cpu/0/msr $(( 0x0000008b )) 0x1000065 new: # ./rdmsr /dev/cpu/0/msr $(( 0x0000008b )) 0x1000083 But I already got one guest crashing: int3: 0000 [1] SMP last sysfs file: /sys/kernel/uevent_seqnum CPU 2 Modules linked in: nls_utf8 cifs(X) af_packet virtio_net virtio_pci virtio_ring virtio edd ext3 mbcache jbd fan ide_pci_generic ide_core ata_generic sata_nv libata scsi_mod dock thermal processor thermal_sys hwmon Supported: Yes, External Pid: 0, comm: swapper Tainted: G S 2.6.27.7-9-default #1 RIP: 0010:[<ffffffff80a500f1>] [<ffffffff80a500f1>] per_cpu__cpu_state+0x1/0x4 RSP: 0018:ffff88007a493fa8 EFLAGS: 00000083 RAX: ffffffff806f5fa0 RBX: ffffffff80a500f0 RCX: 0000000000000000 RDX: ffff880001033200 RSI: 0000000000000000 RDI: ffffffffff5fc0b0 RBP: ffff88007a48beb0 R08: 0000000000000000 R09: ffff880001039638 R10: 00000000ffffffff R11: ffffffff8021c5d9 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe3252e4950(0000) GS:ffff88007a461f40(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: 000000000062d000 CR3: 000000007c10a000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 0, threadinfo ffff88007a48a000, task ffff88007a488280) Stack: ffff88007a48beb0 ffffffff8020ca2e ffff88007a48beb0 <EOI> 0000007dd83ce327 0000000000000086 ffff8800010396d0 0000000002625a00 0000000000000002 000000010000eadc 0000007dd83ce327 0000000000000292 0000000000000292 Call Trace: Inexact backtrace: <IRQ> [<ffffffff8020ca2e>] ? ret_from_intr+0x0/0x29 <EOI> [<ffffffff804a6992>] ? notifier_call_chain+0x29/0x4c [<ffffffff80213465>] ? default_idle+0x38/0x54 [<ffffffff8020b34a>] ? cpu_idle+0xa9/0xf1 Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <cc> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc RIP [<ffffffff80a500f1>] per_cpu__cpu_state+0x1/0x4 RSP <ffff88007a493fa8> ---[ end trace 17313f34f216af07 ]--- Kernel panic - not syncing: Attempted to kill the idle task! ------------[ cut here ]------------ WARNING: at kernel/smp.c:331 smp_call_function_mask+0x38/0x1f2() Modules linked in: nls_utf8 cifs(X) af_packet virtio_net virtio_pci virtio_ring virtio edd ext3 mbcache jbd fan ide_pci_generic ide_core ata_generic sata_nv libata scsi_mod dock thermal processor thermal_sys hwmon Supported: Yes, External Pid: 0, comm: swapper Tainted: G S D 2.6.27.7-9-default #1 Call Trace: [<ffffffff8020e42e>] show_trace_log_lvl+0x41/0x58 [<ffffffff804a1e97>] dump_stack+0x69/0x6f [<ffffffff80240eb2>] warn_on_slowpath+0x51/0x77 [<ffffffff80261fef>] smp_call_function_mask+0x38/0x1f2 [<ffffffff802621d2>] smp_call_function+0x29/0x2e [<ffffffff8021ba16>] native_smp_send_stop+0x1a/0x3f [<ffffffff804a1f59>] panic+0xbc/0x170 [<ffffffff802449e2>] do_exit+0x6b/0x334 [<ffffffff804a4b9b>] oops_begin+0x0/0x9e [<ffffffff804a524a>] do_int3+0x7d/0xa1 [<ffffffff804a46e6>] int3+0xb6/0xf0 [<ffffffff80a500f1>] per_cpu__cpu_state+0x1/0x4 DWARF2 unwinder stuck at per_cpu__cpu_state+0x1/0x4 Leftover inexact backtrace: <IRQ> [<ffffffff8020ca2e>] ret_from_intr+0x0/0x29 <EOI> [<ffffffff804a6992>] notifier_call_chain+0x29/0x4c [<ffffffff80213465>] default_idle+0x38/0x54 [<ffffffff8020b34a>] cpu_idle+0xa9/0xf1 ---[ end trace 17313f34f216af07 ]--- The UP guests seemed to work fine - will start them again now. Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
