Software: 1. Suse Linux SLES 9 SP1 2. kernel linux-2.6.12-rc4-mm1 + kexec-on-panic with nmi_watchdog fix patch http://marc.theaimsgroup.com/?l=linux-kernel&m=111631994607762&w=2 3. Kexec-tools-1.101 + kdump patch 4. kernbench and cerberus 5. spinlock test module to force spinlock deadlock with irq disabled. Test-procedure: o Ran test suite KERNBENCH and CERBERUS test ran successfully. Forced system hang by inserting spinlock test module and tried to invoke panic with sysrq+c, but it failed to force Panic. I failed to take the dump as sysrq keys failed to respond during hang. o Booted with nmi_watchdog=2 and ran similar tests and then forced system hang by inserting spinlock module, nmi_watchdog caused kernel panic and the system booted to panic kernel. I was able to take dump. The first