Hello Atsushi,
I debugged my problem a bit further and tried to implement
a function that gets the maximum page frame number from the
Linux kernel memory management structures.
I am no memory management expert, so the following patch probably
is not complete, but at least for my setup it worked.
Michael
---
makedumpfile.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
--- a/makedumpfile.c
+++ b/makedumpfile.c
@@ -2029,6 +2029,48 @@ pgdat4:
return SYMBOL(contig_page_data);
}
+int
+get_max_pfn(void)
+{
+ unsigned long pgdat, node_start_pfn, node_spanned_pages, max_pfn = 0;
+ int num_nodes, node;
+
+ if ((node = next_online_node(0)) < 0) {
+ ERRMSG("Can't get next online node.\n");
+ return FALSE;
+ }
+ if (!(pgdat = next_online_pgdat(node))) {
+ ERRMSG("Can't get pgdat list.\n");
+ return FALSE;
+ }
+ for (num_nodes = 1; num_nodes <= vt.numnodes; num_nodes++) {
+ if (!readmem(VADDR, pgdat + OFFSET(pglist_data.node_start_pfn),
+ &node_start_pfn, sizeof node_start_pfn)) {
+ ERRMSG("Can't get node_start_pfn.\n");
+ return FALSE;
+ }
+ if (!readmem(VADDR,
+ pgdat + OFFSET(pglist_data.node_spanned_pages),
+ &node_spanned_pages, sizeof node_spanned_pages)) {
+ ERRMSG("Can't get node_spanned_pages.\n");
+ return FALSE;
+ }
+ max_pfn = MAX(max_pfn, (node_start_pfn + node_spanned_pages));
+ if (num_nodes < vt.numnodes) {
+ if ((node = next_online_node(node + 1)) < 0) {
+ ERRMSG("Can't get next online node.\n");
+ return FALSE;
+ } else if (!(pgdat = next_online_pgdat(node))) {
+ ERRMSG("Can't determine pgdat list (node
%d).\n",
+ node);
+ return FALSE;
+ }
+ }
+ }
+ info->max_mapnr = max_pfn;
+ return TRUE;
+}
+
void
dump_mem_map(unsigned long long pfn_start,
unsigned long long pfn_end, unsigned long mem_map, int num_mm)
@@ -2853,6 +2908,9 @@ out:
if (!get_numnodes())
return FALSE;
+ if (!get_max_pfn())
+ return FALSE;
+
if (!get_mem_map())
return FALSE;
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