Hi Jay,
My IA64 linux-2.6.27-rc7 kernel could boot by your patches and its kdump
succeeded, thanks. But I cannot reproduce this problem unfortunately.
Could you send me your kernel .config file to reproduce it ?
And could you please research the reason why the page of virtual address
0xe0000060031417a8 is excluded ? This patch is for researching it.
Please apply it against makedumpfile-1.2.9, and create a dump file
by makedumpfile with "-e 0xe0000060031417a8" option. The reason why
excluding the page is printed like the following:
# makedumpfile -cd31 -e 0xe000000062744000 -x vmlinux /proc/vmcore dump.cd31
The kernel version is not supported.
The created dumpfile may be incomplete.
Excluding unnecessary pages : [100 %]
PAGE(vaddr:e000000062744000, pfn:189d1) is excluded as FREE PAGE.
Copying data : [100 %]
The dumpfile is saved to dump.cd31.
makedumpfile Completed.
#
Thanks
Ken'ichi Ohmichi
---
diff -puN backup/makedumpfile-1.2.9/makedumpfile.c makedumpfile/makedumpfile.c
--- backup/makedumpfile-1.2.9/makedumpfile.c 2008-09-04 16:31:58.000000000 +0900
+++ makedumpfile/makedumpfile.c 2008-09-22 20:15:37.000000000 +0900
@@ -3360,6 +3360,9 @@ out:
if (!get_mem_map())
return FALSE;
+ if (info->vaddr_why_excluded)
+ info->pfn_why_excluded = (vaddr_to_paddr(info->vaddr_why_excluded) / info->page_size);
+
return TRUE;
}
@@ -3470,8 +3473,14 @@ clear_bit_on_1st_bitmap(unsigned long lo
}
int
-clear_bit_on_2nd_bitmap(unsigned long long pfn)
+clear_bit_on_2nd_bitmap(unsigned long long pfn, char *page_type)
{
+ if (info->pfn_why_excluded == pfn) {
+ MSG("\n");
+ MSG("PAGE(vaddr:%lx, pfn:%llx) is excluded as %s.\n",
+ info->vaddr_why_excluded, info->pfn_why_excluded, page_type);
+ MSG("\n");
+ }
return set_bitmap(info->bitmap2, pfn, 0);
}
@@ -3872,7 +3881,7 @@ reset_bitmap_of_free_pages(unsigned long
}
for (i = 0; i < (1<<order); i++) {
pfn = start_pfn + i;
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "FREE PAGE");
}
found_free_pages += i;
@@ -4114,7 +4123,7 @@ exclude_zero_pages(void)
return FALSE;
if (is_zero_page(buf, info->page_size)) {
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "ZERO PAGE");
pfn_zero++;
}
}
@@ -4186,7 +4195,7 @@ exclude_unnecessary_pages(void)
if ((info->dump_level & DL_EXCLUDE_CACHE)
&& (isLRU(flags) || isSwapCache(flags))
&& !isPrivate(flags) && !isAnon(mapping)) {
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "CACHE PAGE");
pfn_cache++;
}
/*
@@ -4195,7 +4204,7 @@ exclude_unnecessary_pages(void)
else if ((info->dump_level & DL_EXCLUDE_CACHE_PRI)
&& (isLRU(flags) || isSwapCache(flags))
&& !isAnon(mapping)) {
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "CACHE PRIVATE PAGE");
pfn_cache_private++;
}
/*
@@ -4203,7 +4212,7 @@ exclude_unnecessary_pages(void)
*/
else if ((info->dump_level & DL_EXCLUDE_USER_DATA)
&& isAnon(mapping)) {
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "USER DATA PAGE");
pfn_user++;
}
}
@@ -5794,7 +5803,7 @@ exclude_xen_user_domain(void)
size * info->num_load_memory);
if (!allocated_in_map(pfn)) {
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "USER DOMAIN PAGE");
continue;
}
@@ -5802,7 +5811,7 @@ exclude_xen_user_domain(void)
if (!readmem(VADDR_XEN,
page_info_addr + OFFSET(page_info.count_info),
&count_info, sizeof(count_info))) {
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "USER DOMAIN PAGE");
continue; /* page_info may not exist */
}
if (!readmem(VADDR_XEN,
@@ -5823,7 +5832,7 @@ exclude_xen_user_domain(void)
continue;
if ((count_info & 0xffff) && is_select_domain(_domain))
continue;
- clear_bit_on_2nd_bitmap(pfn);
+ clear_bit_on_2nd_bitmap(pfn, "USER DOMAIN PAGE");
}
}
@@ -6162,7 +6171,7 @@ main(int argc, char *argv[])
info->block_order = DEFAULT_ORDER;
message_level = DEFAULT_MSG_LEVEL;
- while ((opt = getopt_long(argc, argv, "b:cDd:EFfg:hi:RVvXx:", longopts,
+ while ((opt = getopt_long(argc, argv, "b:cDd:Ee:Ffg:hi:RVvXx:", longopts,
NULL)) != -1) {
switch (opt) {
case 'b':
@@ -6180,6 +6189,9 @@ main(int argc, char *argv[])
case 'E':
info->flag_elf_dumpfile = 1;
break;
+ case 'e':
+ info->vaddr_why_excluded = strtoul(optarg, NULL, 0);
+ break;
case 'F':
info->flag_flatten = 1;
break;
diff -puN backup/makedumpfile-1.2.9/makedumpfile.h makedumpfile/makedumpfile.h
--- backup/makedumpfile-1.2.9/makedumpfile.h 2008-09-04 16:31:58.000000000 +0900
+++ makedumpfile/makedumpfile.h 2008-09-22 18:41:16.000000000 +0900
@@ -725,6 +725,8 @@ struct DumpInfo {
int flag_force; /* overwrite existing stuff */
int flag_exclude_xen_dom;/* exclude Domain-U from xen-kdump */
unsigned long vaddr_for_vtop; /* virtual address for debugging */
+ unsigned long vaddr_why_excluded;
+ unsigned long long pfn_why_excluded;
long page_size; /* size of page */
long page_shift;
unsigned long long max_mapnr; /* number of page descriptor */
