Mark inflated and never onlined pages PG_offline, to tell the world that the content is stale and should not be dumped.
Cc: Xavier Deguillard <xdeguill...@vmware.com> Cc: Nadav Amit <na...@vmware.com> Cc: Arnd Bergmann <a...@arndb.de> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> Cc: Julien Freche <jfre...@vmware.com> Cc: Andrew Morton <a...@linux-foundation.org> Cc: Matthew Wilcox <wi...@infradead.org> Cc: Michal Hocko <mho...@suse.com> Cc: "Michael S. Tsirkin" <m...@redhat.com> Acked-by: Nadav Amit <na...@vmware.com> Signed-off-by: David Hildenbrand <da...@redhat.com> --- drivers/misc/vmw_balloon.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/misc/vmw_balloon.c b/drivers/misc/vmw_balloon.c index e6126a4b95d3..877611b5659b 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -556,6 +556,36 @@ vmballoon_page_in_frames(enum vmballoon_page_size_type page_size) return 1 << vmballoon_page_order(page_size); } +/** + * vmballoon_mark_page_offline() - mark a page as offline + * @page: pointer for the page. + * @page_size: the size of the page. + */ +static void +vmballoon_mark_page_offline(struct page *page, + enum vmballoon_page_size_type page_size) +{ + int i; + + for (i = 0; i < vmballoon_page_in_frames(page_size); i++) + __SetPageOffline(page + i); +} + +/** + * vmballoon_mark_page_online() - mark a page as online + * @page: pointer for the page. + * @page_size: the size of the page. + */ +static void +vmballoon_mark_page_online(struct page *page, + enum vmballoon_page_size_type page_size) +{ + int i; + + for (i = 0; i < vmballoon_page_in_frames(page_size); i++) + __ClearPageOffline(page + i); +} + /** * vmballoon_send_get_target() - Retrieve desired balloon size from the host. * @@ -612,6 +642,7 @@ static int vmballoon_alloc_page_list(struct vmballoon *b, ctl->page_size); if (page) { + vmballoon_mark_page_offline(page, ctl->page_size); /* Success. Add the page to the list and continue. */ list_add(&page->lru, &ctl->pages); continue; @@ -850,6 +881,7 @@ static void vmballoon_release_page_list(struct list_head *page_list, list_for_each_entry_safe(page, tmp, page_list, lru) { list_del(&page->lru); + vmballoon_mark_page_online(page, page_size); __free_pages(page, vmballoon_page_order(page_size)); } -- 2.17.2 _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel