From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk1-f199.google.com (mail-qk1-f199.google.com [209.85.222.199]) by kanga.kvack.org (Postfix) with ESMTP id A55616B000D for ; Wed, 14 Nov 2018 16:17:48 -0500 (EST) Received: by mail-qk1-f199.google.com with SMTP id y83so40099579qka.7 for ; Wed, 14 Nov 2018 13:17:48 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id n32si549496qtd.130.2018.11.14.13.17.47 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 14 Nov 2018 13:17:47 -0800 (PST) From: David Hildenbrand Subject: [PATCH RFC 3/6] kexec: export PG_offline to VMCOREINFO Date: Wed, 14 Nov 2018 22:17:01 +0100 Message-Id: <20181114211704.6381-4-david@redhat.com> In-Reply-To: <20181114211704.6381-1-david@redhat.com> References: <20181114211704.6381-1-david@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: 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, David Hildenbrand , Andrew Morton , Dave Young , "Kirill A. Shutemov" , Baoquan He , Omar Sandoval , Arnd Bergmann , Matthew Wilcox , Michal Hocko , "Michael S. Tsirkin" Let's export PG_offline via PAGE_OFFLINE_MAPCOUNT_VALUE, so makedumpfile can directly skip pages that are logically offline and the content therefore stale. Cc: Andrew Morton Cc: Dave Young Cc: "Kirill A. Shutemov" Cc: Baoquan He Cc: Omar Sandoval Cc: Arnd Bergmann Cc: Matthew Wilcox Cc: Michal Hocko Cc: "Michael S. Tsirkin" Signed-off-by: David Hildenbrand --- kernel/crash_core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/crash_core.c b/kernel/crash_core.c index 933cb3e45b98..093c9f917ed0 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -464,6 +464,8 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE); #ifdef CONFIG_HUGETLB_PAGE VMCOREINFO_NUMBER(HUGETLB_PAGE_DTOR); +#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline) + VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE); #endif arch_crash_save_vmcoreinfo(); -- 2.17.2