[PATCH v1 4/8] xen/balloon: mark inflated pages PG_offline
flat view
STALE2879d
From: David Hildenbrand <hidden>
Date: 2018-11-19 10:16:12
Also in:
kexec, linux-fsdevel, linux-mm, linux-pm, lkml
Subsystem:
the rest, xen hypervisor interface · Maintainers:
Linus Torvalds, Juergen Gross, Stefano Stabellini
Revision v1 of 3 in this series.
Revisions (3)
- rfc [diff vs current]
- v1 current
- v2 [diff vs current]
Mark inflated and never onlined pages PG_offline, to tell the world that the content is stale and should not be dumped. Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: Stefano Stabellini <sstabellini@kernel.org> 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> --- drivers/xen/balloon.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 12148289debd..14dd6b814db3 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c@@ -425,6 +425,7 @@ static int xen_bring_pgs_online(struct page *pg, unsigned int order) for (i = 0; i < size; i++) { p = pfn_to_page(start_pfn + i); __online_page_set_limits(p); + __SetPageOffline(p); __balloon_append(p); } mutex_unlock(&balloon_mutex);
@@ -493,6 +494,7 @@ static enum bp_state increase_reservation(unsigned long nr_pages) xenmem_reservation_va_mapping_update(1, &page, &frame_list[i]); /* Relinquish the page back to the allocator. */ + __ClearPageOffline(page); free_reserved_page(page); }
@@ -519,6 +521,7 @@ static enum bp_state decrease_reservation(unsigned long nr_pages, gfp_t gfp) state = BP_EAGAIN; break; } + __SetPageOffline(page); adjust_managed_page_count(page, -1); xenmem_reservation_scrub_page(page); list_add(&page->lru, &pages);
--
2.17.2