[Crash-utility] Xen Dumping - Expectations

Not quite sure if this or the kdump list is appropriate for this discussion, but I will start here... I've been playing with xen dumping on x86_64 and x86 (RHEL5 20061006.2); The following is a simple crash session on x86_64 (using "xm dump-core -L"): `crash /usr/lib/debug/lib/modules/2.6.18-1.2714.el5xen/vmlinux /xen/dump/Live_Dump` "WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame WARNING: possibly bogus exception frame KERNEL: /usr/lib/debug/lib/modules/2.6.18-1.2714.el5xen/vmlinux DUMPFILE: /xen/dump/Live_Dump CPUS: 1 DATE: Mon Oct 16 11:46:02 2006 UPTIME: 00:07:12 LOAD AVERAGE: 0.00, 0.02, 0.00 TASKS: 67 NODENAME: dhcp78-103.lab.boston.redhat.com RELEASE: 2.6.18-1.2714.el5xen VERSION: #1 SMP Mon Oct 2 17:26:27 EDT 2006 MACHINE: x86_64 (3200 Mhz) MEMORY: 264 MB PANIC: "" PID: 0 COMMAND: "swapper" TASK: ffffffff804c5ae0 [THREAD_INFO: ffffffff805de000] CPU: 0 STATE: TASK_RUNNING (ACTIVE) WARNING: panic task not found crash>crash> bt crash> crash> ffffff805dff68] raw_safe_halt at ffffffff8026c989 crash> ffffff805dff88] xen_idle at ffffffff8026a04d crash> ffffff805dff98] cpu_idle at ffffffff80248e4d" *WARNINGS, WARNINGS, WARNINGS (no such problem like this for i386.) *The output of bt doesn't actually work as expected. You have to hit carriage return a couple times before you see anything. #####i386############################################################# crash /usr/lib/debug/lib/modules/2.6.18-1.2714.el5xen/vmlinux /xen/dump/live_dump This GDB was configured as "i686-pc-linux-gnu"... KERNEL: /usr/lib/debug/lib/modules/2.6.18-1.2714.el5xen/vmlinux DUMPFILE: /xen/dump/live_dump CPUS: 1 DATE: Mon Oct 16 11:47:28 2006 UPTIME: 00:08:30 LOAD AVERAGE: 0.00, 0.04, 0.03 TASKS: 68 NODENAME: dhcp78-115.lab.boston.redhat.com RELEASE: 2.6.18-1.2714.el5xen VERSION: #1 SMP Mon Oct 2 17:40:51 EDT 2006 MACHINE: i686 (3200 Mhz) MEMORY: 264 MB PANIC: "" PID: 0 COMMAND: "swapper" TASK: c0674a60 [THREAD_INFO: c07a3000] CPU: 0 STATE: TASK_RUNNING (ACTIVE) WARNING: panic task not found crash> bt crash> crash> 7a3fa8] hypercall_page at c04013a7 crash> 7a3fb8] xen_idle at c0402bdb crash> 7a3fc0] cpu_idle at c0402d02 crash> *The output of bt doesn't actually work as expected. You have to hit carriage return a couple times before you see anything and the addresses are partially visible... *panic task not found? Are these known problems with crash and/or xen? Is xen dumping supported on x86, x86_64, ppc, ia64? Can anyone point me to docs that talk about xen dumping (e.g. internal/external wiki?) -Josh