From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by casper.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gOgcn-0001Zv-Mg for kexec@lists.infradead.org; Mon, 19 Nov 2018 10:17:53 +0000 From: David Hildenbrand Subject: [PATCH v1 6/8] vmw_balloon: mark inflated pages PG_offline Date: Mon, 19 Nov 2018 11:16:14 +0100 Message-Id: <20181119101616.8901-7-david@redhat.com> In-Reply-To: <20181119101616.8901-1-david@redhat.com> References: <20181119101616.8901-1-david@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: linux-mm@kvack.org Cc: Michal Hocko , "Michael S. Tsirkin" , Arnd Bergmann , linux-pm@vger.kernel.org, pv-drivers@vmware.com, Greg Kroah-Hartman , linux-doc@vger.kernel.org, kexec-ml , linux-kernel@vger.kernel.org, Matthew Wilcox , Xavier Deguillard , Julien Freche , Nadav Amit , xen-devel@lists.xenproject.org, linux-fsdevel@vger.kernel.org, devel@linuxdriverproject.org, David Hildenbrand , Andrew Morton 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 Cc: Nadav Amit Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Cc: Julien Freche Cc: Andrew Morton Cc: Matthew Wilcox Cc: Michal Hocko Cc: "Michael S. Tsirkin" Signed-off-by: David Hildenbrand --- 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..8cc8bd9a4e32 100644 --- a/drivers/misc/vmw_balloon.c +++ b/drivers/misc/vmw_balloon.c @@ -544,6 +544,36 @@ unsigned int vmballoon_page_order(enum vmballoon_page_size_type page_size) return page_size == VMW_BALLOON_2M_PAGE ? VMW_BALLOON_2M_ORDER : 0; } +/** + * 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 < 1ULL << vmballoon_page_order(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 < 1ULL << vmballoon_page_order(page_size); i++) + __ClearPageOffline(page + i); +} + /** * vmballoon_page_in_frames() - returns the number of frames in a page. * @page_size: the size of the page. @@ -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 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec