linux-kernel - [PATCH v1 2/2] kdump: include PG

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Message-Id: <20180720123422.10127-3-david@redhat.com>
Date:   Fri, 20 Jul 2018 14:34:22 +0200
From:   David Hildenbrand <david@...hat.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org, David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dave Young <dyoung@...hat.com>, Baoquan He <bhe@...hat.com>,
        Hari Bathini <hbathini@...ux.vnet.ibm.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Michal Hocko <mhocko@...nel.org>
Subject: [PATCH v1 2/2] kdump: include PG_reserved value in VMCOREINFO

PG_reserved pages should never be touched by enybody except their owner.
Let's allow dumping tools to skip these pages.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Dave Young <dyoung@...hat.com>
Cc: Baoquan He <bhe@...hat.com>
Cc: Hari Bathini <hbathini@...ux.vnet.ibm.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Michal Hocko <mhocko@...nel.org>
Signed-off-by: David Hildenbrand <david@...hat.com>
---
 kernel/crash_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index b66aced5e8c2..ab216accf96a 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -451,6 +451,7 @@ static int __init crash_save_vmcoreinfo_init(void)
 	log_buf_vmcoreinfo_setup();
 	VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
 	VMCOREINFO_NUMBER(NR_FREE_PAGES);
+	VMCOREINFO_NUMBER(PG_reserved);
 	VMCOREINFO_NUMBER(PG_lru);
 	VMCOREINFO_NUMBER(PG_private);
 	VMCOREINFO_NUMBER(PG_swapcache);
-- 
2.17.1