[Xen-bugs] [Bug 366] New: kernel BUG at arch/xen/kernel/smpboot.c:186 (vcpu_prepare)!

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=366

           Summary: kernel BUG at arch/xen/kernel/smpboot.c:186
                    (vcpu_prepare)!
           Product: Xen
           Version: unstable
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: pl@xxxxxxxxxx
                CC: hohnbaum@xxxxxxxxxx,ryanh@xxxxxxxxxx


4xPIII-700
4GB ram
Default kernel config except smp and smt added to this particular kernel config 
set.

changeset:   7500:20d1a79ebe31
tag:         tip
user:        emellor@xxxxxxxxxxxxxxxxxxxxxx
date:        Wed Oct 26 16:59:13 2005 +0100
summary:     Fix the check for non-existence of the save/restore directories, by
using &&

On booting dom0, I get:
Checking 'hlt' instruction... disabled
kernel BUG at arch/xen/kernel/smpboot.c:186 (vcpu_prepare)!
 [<c01075ea>] vcpu_prepare+0x1ea/0x200
 [<c0107390>] cpu_bringup+0x0/0x70
 [<c010a0c8>] divide_error+0x0/0x8
 [<c010a224>] debug+0x0/0x11
 [<c010a268>] int3+0x0/0x24
 [<c010a28c>] overflow+0x0/0xc
 [<c010a298>] bounds+0x0/0xc
 [<c010a2a4>] invalid_op+0x0/0xc
 [<c010a1e8>] device_not_available+0x0/0x3c
 [<c010a2b0>] coprocessor_segment_overrun+0x0/0xc
 [<c010a2bc>] invalid_TSS+0x0/0xc
 [<c010a2c8>] segment_not_present+0x0/0xc
 [<c010a2d4>] stack_segment+0x0/0xc
 [<c010a2e0>] general_protection+0x0/0xc
 [<c010a2f8>] page_fault+0x0/0x34
 [<c010a32c>] fixup_4gb_segment+0x0/0x14
 [<c010a1d0>] coprocessor_error+0x0/0xc
 [<c010a2ec>] alignment_check+0x0/0xc
 [<c010a1dc>] simd_coprocessor_error+0x0/0xc
 [<c0109f0c>] system_call+0x0/0x32
 [<c010a100>] hypervisor_callback+0x0/0x34
 [<c010a1ac>] failsafe_callback+0x0/0x24
 [<c058b73a>] smp_prepare_cpus+0x13a/0x210
 [<c01040b8>] init+0x38/0x1b0
 [<c0104080>] init+0x0/0x1b0
 [<c0107d7d>] kernel_thread_helper+0x5/0x18
Kernel panic - not syncing: BUG!
 smp_send_stop disable_local_APIC
(XEN) Domain 0 shutdown: rebooting machine.

Added some printks and found that HYPERVISOR_vcpu_op VCPUOP_initialise is
getting called on vcpu 1 when it happens, and it's BUGging from getting a return
of -22 (EINVAL).

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