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Commit acd99dbf authored by Ken'ichi Ohmichi's avatar Ken'ichi Ohmichi Committed by Linus Torvalds
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kdump: add vmlist.addr to vmcoreinfo for x86 vmalloc translation. 

Add the symbols 'vmlist' and offset 'vm_struct.addr' to the vmcoreinfo[1]
data for i386 vmalloc translation.

makedumpfile[2] needs VMALLOC_START value for distinguishing a vmalloc
address or not, because it should choose suitable translation method.  If
applying this patch, makedumpfile will be able to take VMALLOC_START value
from 'vmlist.addr'.

vmcoreinfo[1]:
The vmcoreinfo data has the minimum debugging information only for dump
filtering. makedumpfile[2] uses it to distinguish unnecessary pages and
creates a small dumpfile.

makedumpfile[2]:
dump filtering command
https://sourceforge.net/projects/makedumpfile/



Signed-off-by: default avatarKen'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d9a9855d

kernel/kexec.c

+2 −0
Original line number Diff line number Diff line
@@ -1371,6 +1371,7 @@ static int __init crash_save_vmcoreinfo_init(void) 
	VMCOREINFO_SYMBOL(node_online_map);

	VMCOREINFO_SYMBOL(swapper_pg_dir);

	VMCOREINFO_SYMBOL(_stext);

	VMCOREINFO_SYMBOL(vmlist);



#ifndef CONFIG_NEED_MULTIPLE_NODES

	VMCOREINFO_SYMBOL(mem_map);
@@ -1406,6 +1407,7 @@ static int __init crash_save_vmcoreinfo_init(void) 
	VMCOREINFO_OFFSET(free_area, free_list);

	VMCOREINFO_OFFSET(list_head, next);

	VMCOREINFO_OFFSET(list_head, prev);

	VMCOREINFO_OFFSET(vm_struct, addr);

	VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER);

	VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);

	VMCOREINFO_NUMBER(NR_FREE_PAGES);