From: Ken'ichi Ohmichi Date: Tue, 8 Jan 2008 23:33:05 +0000 (-0800) Subject: vmcoreinfo: add the array length of "free_list" for filtering free pages X-Git-Tag: v2.6.24-rc8~62 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=83a08e7c6ed533a47631794e7f618a98094b4129;p=linux-2.6 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: Huang Ying Tested-by: Ken'ichi Ohmichi Acked-by: Simon Horman Cc: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/kernel/kexec.c b/kernel/kexec.c index aa74a1ef2d..9a26eec9eb 100644 --- a/kernel/kexec.c +++ b/kernel/kexec.c @@ -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();