Experimental Patches Allow Much Faster AArch64 & RISC-V Kexec Kernel Reboots | Michael Larabel, Phoronix

For those making use of Kexec reboots for booting to a new kernel without fully bringing down the system to reduce the server downtime from POST’ing and other hardware initialization tasks, Kexec reboots may soon be much faster on 64-bit Arm and RISC-V systems.

Currently carrying out a Kexec reboot on RISC-V and 64-bit Arm can be rather slow for high core count systems since the code path taken on those architectures ends up tearing down the CPUs serially.

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