Subj : [$] Memory persistence over kexec
To   : All
From : LWN.net
Date : Tue Apr 01 2025 15:15:08

[$] 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.

======================================================================
Link to news story:
https://lwn.net/Articles/1015997/


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