[lttng-dev] Progress on system crash traces with LTTng using DAX and pmem

[Kirill A. Shutemov]

On Sat, Oct 25, 2014 at 12:51:25PM +0000, Mathieu Desnoyers wrote:
> FYI, the main reason why my customer wants to go with a
> "trace into memory that survives soft reboot" approach
> rather than to use things like kexec/kdump is that they
> care about the amount of time it takes to reboot their
> machines. They want a solution where they can extract the
> detailed crash data after reboot, after the machine is
> back online, rather than requiring a few minutes of offline
> time to extract the crash details.

IIRC, on x86 there's no guarantee that your memory content will be
preserved over reboot. BIOS is free to mess with it.

-- 
 Kirill A. Shutemov