Commit 83a08e7c authored by Ken'ichi Ohmichi's avatar Ken'ichi Ohmichi Committed by Linus Torvalds

vmcoreinfo: add the array length of "free_list" for filtering free pages

This patch adds the array length of "free_area.free_list" to the vmcoreinfo
data so that makedumpfile (dump filtering command) can exclude all free pages
in linux-2.6.24.

makedumpfile creates a small dumpfile by excluding unnecessary pages for the
analysis. To distinguish unnecessary pages, makedumpfile gets the vmcoreinfo
data which has the minimum debugging information only for dump filtering.

In 2.6.24-rc1 or later, the free_area.free_list is an array which has one list
for each migrate types instead of a single list. makedumpfile needs the array
length of "free_area.free_list" and the vmcoreinfo data should contain it.
Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
Tested-by: default avatarKen'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Acked-by: default avatarSimon Horman <horms@verge.net.au>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent caeeeecf
......@@ -1404,6 +1404,7 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_OFFSET(list_head, next);
VMCOREINFO_OFFSET(list_head, prev);
VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER);
VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
VMCOREINFO_NUMBER(NR_FREE_PAGES);
arch_crash_save_vmcoreinfo();
......
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