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Occasionally we see reports of page table corruption, and it's not clear why.
By printing out the hardware name, we could potentially see some patterns.
Signed-off-by: Dave Jones <davej@redhat.com>
--- linux.orig/include/asm-generic/bug.h
+++ linux/include/asm-generic/bug.h
@@ -55,6 +55,8 @@ struct bug_entry {
#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
#endif
+void print_hardware_dmi_name(void);
+
/*
* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report
* significant issues that need prompt attention if they should ever
--- linux.orig/kernel/panic.c
+++ linux/kernel/panic.c
@@ -391,6 +391,15 @@ void oops_exit(void)
kmsg_dump(KMSG_DUMP_OOPS);
}
+void print_hardware_dmi_name(void)
+{
+ const char *board;
+
+ board = dmi_get_system_info(DMI_PRODUCT_NAME);
+ if (board)
+ printk(KERN_WARNING "Hardware name: %s\n", board);
+}
+
#ifdef WANT_WARN_ON_SLOWPATH
struct slowpath_args {
const char *fmt;
@@ -400,13 +409,10 @@ struct slowpath_args {
static void warn_slowpath_common(const char *file, int line, void *caller,
unsigned taint, struct slowpath_args *args)
{
- const char *board;
-
printk(KERN_WARNING "------------[ cut here ]------------\n");
printk(KERN_WARNING "WARNING: at %s:%d %pS()\n", file, line, caller);
- board = dmi_get_system_info(DMI_PRODUCT_NAME);
- if (board)
- printk(KERN_WARNING "Hardware name: %s\n", board);
+
+ print_hardware_dmi_name();
if (args)
vprintk(args->fmt, args->args);
--- linux.orig/mm/memory.c
+++ linux/mm/memory.c
@@ -706,6 +706,8 @@ static void print_bad_pte(struct vm_area
"BUG: Bad page map in process %s pte:%08llx pmd:%08llx\n",
current->comm,
(long long)pte_val(pte), (long long)pmd_val(*pmd));
+ print_hardware_dmi_name();
+
if (page)
dump_page(page);
printk(KERN_ALERT
--- linux.orig/mm/page_alloc.c
+++ linux/mm/page_alloc.c
@@ -321,6 +321,7 @@ static void bad_page(struct page *page)
current->comm, page_to_pfn(page));
dump_page(page);
+ print_hardware_dmi_name();
print_modules();
dump_stack();
out:
|
