> Add a registry identifying page use to a kdump kernel. Intended uses are > wiping of crypto keys on crash, or omitting pages holding e.g. crypto > keys or unimportant caches from crash dumps. > > The registry is a bitmap with one bit for each physical page. The > meaning of the bits is set by the crash_memaction= cmdline param. When > not present, no bitmap is allocated. Marking is a lock-free bitmap > update with no allocation, so it is safe from any context. > > The bitmap and its metadata is handed over to the kdump kernel through > elfcorehdr. > > Signed-off-by: Jan Sebastian Götte <[email protected]>
Sashiko has reviewed this patch and found no issues. It looks great! -- Sashiko AI review · https://sashiko.dev/#/patchset/20260928-crash-memaction-upstream-20260921-v3-0-e511e9ee2...@jaseg.de?part=1
