Dumping tools (like makedumpfile) right now don't exclude reserved pages.
So reserved pages might be access by dump tools although nobody except
the owner should touch them.
This is relevant in virtual environments where we soon might want to
report certain reserved pages to the hypervisor and they might no longer
be accessible - what already was documented for reserved pages a long
time ago ("might not even exist").
David Hildenbrand (2):
mm: clarify semantics of reserved pages
kdump: include PG_reserved value in VMCOREINFO
include/linux/page-flags.h | 4 ++--
kernel/crash_core.c | 1 +
2 files changed, 3 insertions(+), 2 deletions(-)
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2.17.1
