[Xen-devel] preempt causes x64 domU (Xen 3.0) to crash.

[Nicholas Lee <emptysands@xxxxxxxxx>]

 Xen version 3.0-devel (nic@localdomain) (gcc version 3.3.5 (Debian
1:3.3.5-13)) Fri Nov 18 17:51:36 NZDT 2005
 Latest ChangeSet: Fri Nov 18 02:56:50 2005 +0100 7870:f6fdb6e0d3c9


nic@wuwei:/usr/src/xen/xen-unstable.hg/linux-2.6.12-xenU$ diff -ru
/boot/config-2.6.12.6-xenU /usr/src/xen/config-2.6.12-xenU
--- /boot/config-2.6.12.6-xenU  2005-11-18 18:39:39.000000000 +1300
+++ /usr/src/xen/config-2.6.12-xenU     2005-11-18 13:48:40.131095426 +1300
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.12.6-xenU
-# Fri Nov 18 18:26:19 2005
+# Sun Nov 13 20:02:46 2005
 #
 CONFIG_XEN=y
 CONFIG_ARCH_XEN=y
@@ -92,7 +92,7 @@
 CONFIG_SMP=y
 CONFIG_NR_CPUS=8
 # CONFIG_SCHED_SMT is not set
-# CONFIG_PREEMPT is not set
+CONFIG_PREEMPT=y
 # CONFIG_MICROCODE is not set
 CONFIG_X86_CPUID=y
 # CONFIG_NUMA is not set
@@ -766,6 +766,7 @@
 CONFIG_LOG_BUF_SHIFT=15
 # CONFIG_SCHEDSTATS is not set
 # CONFIG_DEBUG_SLAB is not set
+CONFIG_DEBUG_PREEMPT=y
 # CONFIG_DEBUG_SPINLOCK is not set
 # CONFIG_DEBUG_SPINLOCK_SLEEP is not set
 # CONFIG_DEBUG_KOBJECT is not set

(XEN) Domain 3 (vcpu#1) crashed on cpu#0:
(XEN) CPU:    0
(XEN) RIP:    e030:[<ffffffff8011c8c0>] ???
(XEN) RFLAGS: 0000000000010246   CONTEXT: hypervisor
(XEN) rax: 0000000000000000   rbx: ffffffffff5fd000   rcx: 0000000000000000
(XEN) rdx: 0000000000000000   rsi: 0000000000000004   rdi: ffff8800013a1098
(XEN) rbp: 0000000000000000   rsp: ffff8800013a0f98   r8:  0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000000
(XEN) r12: 0000000000000000   r13: 0000000000000000   r14: 0000000000000000
(XEN) r15: ffff8800013a1098   cr0: 000000008005003b   cr3: 00000000fbf04000
(XEN) Xen stack trace from rsp=ffff8800013a0f98:
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 00000000fa124066
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 ffffffffff5fd000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 ffff8800013a1268 ffffffff8011306b
(XEN)    ffff8800013a1268 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 ffffffffff5fd000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000004 ffff8800013a1268 ffffffffffffffff
(XEN)    ffffffff80258ff7 000000010000e030 0000000000010096 ffff8800013a1148
(XEN)    000000000000e02b 0000000000000000 0000000000000000 ffffffffff5fd000
(XEN)    0000000000000000 ffffffff8011c8c5 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) Xen call trace:
(XEN)    [<ffffffff8011c8c0>] ???
(XEN)
(XEN) Domain 3 reported crashed by domain 32767 on cpu#0:



This same config worked previously.

--
Nicholas Lee
http://stateless.geek.nz
gpg 8072 4F86 EDCD 4FC1 18EF  5BDD 07B0 9597 6D58 D70C

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