[PATCH] add page flags values to vmcoreinfo

From: "Ken'ichi Ohmichi" <oomichi@mxs.nes.nec.co.jp>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: kexec-ml <kexec@lists.infradead.org>,
	Christoph Lameter <clameter@sgi.com>
Subject: [PATCH] add page flags values to vmcoreinfo
Date: Fri, 28 Mar 2008 18:46:29 +0900	[thread overview]
Message-ID: <47ECBE75.8040101@mxs.nes.nec.co.jp> (raw)

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Hi,

This patch adds some values of page flags to the vmcoreinfo data.

The vmcoreinfo data has the minimum debugging information only
for dump filtering. makedumpfile (dump filtering command) gets
it to distinguish unnecessary pages, and makedumpfile creates
a small dumpfile.

An old makedumpfile (v1.2.4 or before) had assumed some values
of page flags internally, and this implementation could not follow
the change of these values. For example, Christoph Lameter is
changing these values by the follwing patch:
http://lkml.org/lkml/2008/2/29/463

So a new makedumpfile (v1.2.5) came to need these values and I
created this patch to let the kernel output them. This patch is
for linux-2.6.25-rc7.

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
---
diff -rpuN linux-2.6.25-rc6.org/kernel/kexec.c linux-2.6.25-rc6/kernel/kexec.c

--- linux-2.6.25-rc6.org/kernel/kexec.c	2008-03-19 12:12:54.000000000 +0900
+++ linux-2.6.25-rc6/kernel/kexec.c	2008-03-19 12:14:49.000000000 +0900
@@ -1406,6 +1406,9 @@ static int __init crash_save_vmcoreinfo_
 	VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER);
 	VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
 	VMCOREINFO_NUMBER(NR_FREE_PAGES);
+	VMCOREINFO_NUMBER(PG_lru);
+	VMCOREINFO_NUMBER(PG_private);
+	VMCOREINFO_NUMBER(PG_swapcache);
 
 	arch_crash_save_vmcoreinfo();
 




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