[$] Memory persistence over kexec
Date:
Tue, 01 Apr 2025 14:00:00 +0000
Description:
The kernel's kexec
mechanism allows one kernel to directly boot a new one; it can be
thought of as a sort of kernel equivalent to the execve() system call. Kexec has a number of uses, including booting a special kernel
to perform dumps after a crash. Normally, one does not expect user-space processes to survive booting into a new kernel, but that has not stopped developers from trying to implement that ability. Mike Rapoport ran a memory-management-track session at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit to discuss one piece of that problem: enabling the contents of memory to persist across a kexec handover so that
the new kernel can pick up where the old one left off.
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Link to news story:
https://lwn.net/Articles/1015997/
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