Messages in this thread | | | Date | Tue, 28 Oct 2014 12:54:58 +0200 | From | "Kirill A. Shutemov" <> | Subject | Re: Progress on system crash traces with LTTng using DAX and pmem |
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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
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