Hi Bernhard,
Bernhard Walle wrote:
>>> * Ken'ichi Ohmichi [2008-08-05 21:07]:
>>>> BTW, I'd like to know some conditions of this problem.
>>>> So please let me know the makedumpfile commandline which you run.
>>>> Ex. # makedumpfile -d 31 -x vmlinux /proc/vmcore dumpfile
>>> # makedumpfile -d 3 -D vmcore.sles11 vmcore.sles11.filtered
>>>
>>>> I doubt that makedumpfile cannot distinguish the pgtable correctly.
>>>> I created the debugging patch. Please run makedumpfile-1.2.7 applied
>>>> with it by '-D' option, and report the output.
>>>> According to your kernel .config file, the output should contain
>>>> "PAGETABLE_4L : ON".
>>> See the attachment.
>> Thanks for the log.
>> makedumpfile can distinguish the pgtable correctly.
>>
>> Can the crash utility translate the virtual address 0xa0007fff8f900000
>> to physical address ? Please run the following subcommand on the crash
>> utility.
>>
>> crash> vtop 0xa0007fff8f900000
>
> crash> vtop 0xa0007fff8f900000
> VIRTUAL PHYSICAL
> a0007fff8f900000 (not mapped)
>
> PAGE DIRECTORY: a000000100914000
> PGD: a000000100914000 => 30030bc000
> PUD: e0000030030bfff8 => 30030c0000
> PMD: e0000030030c3e38 => 30030c4000
> PTE: e0000030030c7200 => 0
>
>
> But I guess that's normal with virtual memory maps:
>
> $ zgrep VIRTUAL_M /proc/config.gz
> CONFIG_VIRTUAL_MEM_MAP=y
Thank you for your help.
I found an ia64 discontigmem kernel problem that the 'pgdat_list.node_mem_map'
has an unexpected value, and I created the attached patch for avoiding the
problem. If applying this patch, makedumpfile takes mem_map's information
from a symbol 'vmem_map' instead of 'pgdat_list.node_mem_map'.
It is for makedumpfile-1.2.8. Could you please test it ?
Note:
This solution needs a symbol 'vmem_map', but vmcoreinfo data in /proc/vmcore
does not contain it. So "-x" option is necessary for running makedumpfile
like the following.
# makedumpfile -c -d31 -x vmlinux /proc/vmcore dumpfile
Thanks
Ken'ichi Ohmichi
diff -puN backup/v1.2.8/makedumpfile.c makedumpfile/makedumpfile.c
--- backup/v1.2.8/makedumpfile.c 2008-08-12 12:17:24.000000000 +0900
+++ makedumpfile/makedumpfile.c 2008-08-28 02:07:47.000000000 +0900
@@ -1819,6 +1819,7 @@ get_symbol_info()
* Get symbol info.
*/
SYMBOL_INIT(mem_map, "mem_map");
+ SYMBOL_INIT(vmem_map, "vmem_map");
SYMBOL_INIT(mem_section, "mem_section");
SYMBOL_INIT(pkmap_count, "pkmap_count");
SYMBOL_INIT_NEXT(pkmap_count_next, "pkmap_count");
@@ -2110,6 +2111,7 @@ generate_vmcoreinfo()
* write the symbol of 1st kernel
*/
WRITE_SYMBOL("mem_map", mem_map);
+ WRITE_SYMBOL("vmem_map", vmem_map);
WRITE_SYMBOL("mem_section", mem_section);
WRITE_SYMBOL("pkmap_count", pkmap_count);
WRITE_SYMBOL("pkmap_count_next", pkmap_count_next);
@@ -2350,6 +2352,7 @@ read_vmcoreinfo()
return FALSE;
READ_SYMBOL("mem_map", mem_map);
+ READ_SYMBOL("vmem_map", vmem_map);
READ_SYMBOL("mem_section", mem_section);
READ_SYMBOL("pkmap_count", pkmap_count);
READ_SYMBOL("pkmap_count_next", pkmap_count_next);
@@ -2912,6 +2915,7 @@ get_mm_discontigmem()
{
int i, j, id_mm, node, num_mem_map, separate_mm = FALSE;
unsigned long pgdat, mem_map, pfn_start, pfn_end, node_spanned_pages;
+ unsigned long vmem_map;
struct mem_map_data temp_mmd;
num_mem_map = get_num_mm_discontigmem();
@@ -2924,6 +2928,13 @@ get_mm_discontigmem()
separate_mm = TRUE;
}
+ if (SYMBOL(vmem_map) != NOT_FOUND_SYMBOL) {
+ if (!readmem(VADDR, SYMBOL(vmem_map), &vmem_map, sizeof vmem_map)) {
+ ERRMSG("Can't get vmem_map.\n");
+ return FALSE;
+ }
+ }
+
/*
* Get the first node_id.
*/
@@ -2937,11 +2948,6 @@ get_mm_discontigmem()
}
id_mm = 0;
for (i = 0; i < vt.numnodes; i++) {
- if (!readmem(VADDR, pgdat + OFFSET(pglist_data.node_mem_map),
- &mem_map, sizeof mem_map)) {
- ERRMSG("Can't get mem_map.\n");
- return FALSE;
- }
if (!readmem(VADDR, pgdat + OFFSET(pglist_data.node_start_pfn),
&pfn_start, sizeof pfn_start)) {
ERRMSG("Can't get node_start_pfn.\n");
@@ -2954,6 +2960,15 @@ get_mm_discontigmem()
}
pfn_end = pfn_start + node_spanned_pages;
+ if (SYMBOL(vmem_map) == NOT_FOUND_SYMBOL) {
+ if (!readmem(VADDR, pgdat + OFFSET(pglist_data.node_mem_map),
+ &mem_map, sizeof mem_map)) {
+ ERRMSG("Can't get mem_map.\n");
+ return FALSE;
+ }
+ } else
+ mem_map = vmem_map + SIZE(page) * pfn_start;
+
if (separate_mm) {
/*
* For some ia64 NUMA systems.
diff -puN backup/v1.2.8/makedumpfile.h makedumpfile/makedumpfile.h
--- backup/v1.2.8/makedumpfile.h 2008-08-12 12:17:24.000000000 +0900
+++ makedumpfile/makedumpfile.h 2008-08-28 02:06:40.000000000 +0900
@@ -814,6 +814,7 @@ extern struct vm_table vt;
struct symbol_table {
unsigned long long mem_map;
+ unsigned long long vmem_map;
unsigned long long mem_section;
unsigned long long pkmap_count;
unsigned long long pkmap_count_next;
