[PATCH RFC 6/6] PM / Hibernate: exclude all PageOffline() pages
From: David Hildenbrand <hidden>
Date: 2018-11-14 21:17:04
Also in:
linux-doc, linux-fsdevel, linux-mm, lkml
Subsystem:
hibernation (aka software suspend, aka swsusp), suspend to ram, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
The content of pages that are marked PG_offline is not of interest (e.g. inflated by a balloon driver), let's skip these pages. Cc: "Rafael J. Wysocki" <redacted> Cc: Pavel Machek <redacted> Cc: Len Brown <redacted> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: David Hildenbrand <redacted> --- kernel/power/snapshot.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index b0308a2c6000..01db1d13481a 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c@@ -1222,7 +1222,7 @@ static struct page *saveable_highmem_page(struct zone *zone, unsigned long pfn) BUG_ON(!PageHighMem(page)); if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page) || - PageReserved(page)) + PageReserved(page) || PageOffline(page)) return NULL; if (page_is_guard(page))
@@ -1286,6 +1286,9 @@ static struct page *saveable_page(struct zone *zone, unsigned long pfn) if (swsusp_page_is_forbidden(page) || swsusp_page_is_free(page)) return NULL; + if (PageOffline(page)) + return NULL; + if (PageReserved(page) && (!kernel_page_present(page) || pfn_is_nosave(pfn))) return NULL;
--
2.17.2