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vmcoreinfo: add page flags values 

Add 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.

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ken'ichi Ohmichi 2008-04-28 02:13:04 -07:00 committed by Linus Torvalds
parent a08cb629f5
commit 122c7a5905
1 changed files with 3 additions and 0 deletions
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3
kernel/kexec.c
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@ -1405,6 +1405,9 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER); VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER);
VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES); VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
VMCOREINFO_NUMBER(NR_FREE_PAGES); VMCOREINFO_NUMBER(NR_FREE_PAGES);
VMCOREINFO_NUMBER(PG_lru);
VMCOREINFO_NUMBER(PG_private);
VMCOREINFO_NUMBER(PG_swapcache);
arch_crash_save_vmcoreinfo(); arch_crash_save_vmcoreinfo();