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KernelTrap: Preserving Oops Data Through Resets

Apr 12, 2006, 05:15 (0 Talkback[s])


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"James Courtier queried the Linux Kernel mailing list on the feasibility of restoring the kernel ring buffer after a reset. He proposed simply writing the ring buffer data redundantly to memory in the hope that not all RAM is erased at boot time, allowing the buffer to be reconstructed. The kernel ring buffer is typically viewed with the dmesg command. Referring to the method of collecting data from an oops through a serial connection, James explained, 'the main advantage of something like this would be for newer motherboards that are around now that don't have a serial port.' An existing solution to this problem is using kexec to boot a special lightweight kernel after a crash to collect a kernel crash dump..."

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