Brendan Love your work on DTrace. Have you seen / configured a system that keep the FTRACE/DTRACE log data in memory during a crash/ reboot cycle for postmort

Brendan Love your work on DTrace. Have you seen / configured a system that keep the FTRACE/DTRACE log data in memory during a crash/ reboot cycle for postmortem kernel crash type analysis? If so, love the see any reference to how to setup something like that for typical x86 Linux. Did that long time (10+years) ago on MIPS+vxwork/Linux with someother trace log type system. Miss that capability..... Thanks