Let's export PG_offline via PAGE_OFFLINE_MAPCOUNT_VALUE, so
makedumpfile can directly skip pages that are logically offline and the
content therefore stale.
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Dave Young <dyo...@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shute...@linux.intel.com>
Cc: Baoquan He <b...@redhat.com>
Cc: Omar Sandoval <osan...@fb.com>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: Matthew Wilcox <wi...@infradead.org>
Cc: Michal Hocko <mho...@suse.com>
Cc: "Michael S. Tsirkin" <m...@redhat.com>
Signed-off-by: David Hildenbrand <da...@redhat.com>
---
kernel/crash_core.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index 933cb3e45b98..093c9f917ed0 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -464,6 +464,8 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
#ifdef CONFIG_HUGETLB_PAGE
VMCOREINFO_NUMBER(HUGETLB_PAGE_DTOR);
+#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline)
+ VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
#endif
arch_crash_save_vmcoreinfo();
--
2.17.2
