From patchwork Thu Nov 22 10:06:25 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Hildenbrand X-Patchwork-Id: 10693825 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CB5495A4 for ; Thu, 22 Nov 2018 10:07:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BCF982BA70 for ; Thu, 22 Nov 2018 10:07:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B11C42BB0D; Thu, 22 Nov 2018 10:07:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 483302BA70 for ; Thu, 22 Nov 2018 10:07:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393813AbeKVUqF (ORCPT ); Thu, 22 Nov 2018 15:46:05 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49806 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387821AbeKVUqF (ORCPT ); Thu, 22 Nov 2018 15:46:05 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A3BD3C057F9A; Thu, 22 Nov 2018 10:07:19 +0000 (UTC) Received: from t460s.redhat.com (ovpn-116-206.ams2.redhat.com [10.36.116.206]) by smtp.corp.redhat.com (Postfix) with ESMTP id 76DED28552; Thu, 22 Nov 2018 10:07:12 +0000 (UTC) From: David Hildenbrand To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, devel@linuxdriverproject.org, linux-fsdevel@vger.kernel.org, linux-pm@vger.kernel.org, xen-devel@lists.xenproject.org, kexec-ml , pv-drivers@vmware.com, David Hildenbrand , Xavier Deguillard , Nadav Amit , Arnd Bergmann , Greg Kroah-Hartman , Julien Freche , Andrew Morton , Matthew Wilcox , Michal Hocko , "Michael S. Tsirkin" Subject: [PATCH v2 6/8] vmw_balloon: mark inflated pages PG_offline Date: Thu, 22 Nov 2018 11:06:25 +0100 Message-Id: <20181122100627.5189-7-david@redhat.com> In-Reply-To: <20181122100627.5189-1-david@redhat.com> References: <20181122100627.5189-1-david@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Thu, 22 Nov 2018 10:07:19 +0000 (UTC) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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" Acked-by: Nadav Amit 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..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)); }