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Print out some extra debug information when we hit bad page tables.

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This commit is contained in:
Dave Jones 2013-04-11 12:17:38 -04:00
parent c791ed47f0
commit 77c62fd3ed
3 changed files with 93 additions and 0 deletions
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64
debug-bad-pte-dmi.patch Normal file
View File

@ -0,0 +1,64 @@
diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/include/asm-generic/bug.h linux-dj/include/asm-generic/bug.h
--- /home/davej/src/kernel/git-trees/linux/include/asm-generic/bug.h 2013-01-04 18:57:12.604282214 -0500
+++ linux-dj/include/asm-generic/bug.h 2013-02-28 20:04:37.649304147 -0500
@@ -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
diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/kernel/panic.c linux-dj/kernel/panic.c
--- /home/davej/src/kernel/git-trees/linux/kernel/panic.c 2013-02-26 14:41:18.544116674 -0500
+++ linux-dj/kernel/panic.c 2013-02-28 20:04:37.666304115 -0500
@@ -397,16 +397,22 @@ struct slowpath_args {
va_list args;
};
-static void warn_slowpath_common(const char *file, int line, void *caller,
- unsigned taint, struct slowpath_args *args)
+void print_hardware_dmi_name(void)
{
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);
+}
+
+static void warn_slowpath_common(const char *file, int line, void *caller,
+ unsigned taint, struct slowpath_args *args)
+{
+ printk(KERN_WARNING "------------[ cut here ]------------\n");
+ printk(KERN_WARNING "WARNING: at %s:%d %pS()\n", file, line, caller);
+
+ print_hardware_dmi_name();
if (args)
vprintk(args->fmt, args->args);
diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/mm/memory.c linux-dj/mm/memory.c
--- /home/davej/src/kernel/git-trees/linux/mm/memory.c 2013-02-26 14:41:18.591116577 -0500
+++ linux-dj/mm/memory.c 2013-02-28 20:04:37.678304092 -0500
@@ -705,6 +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-dj/mm/page_alloc.c~ 2013-04-11 11:47:12.536675503 -0400
+++ linux-dj/mm/page_alloc.c 2013-04-11 11:47:16.416667806 -0400
@@ -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:

20
debug-bad-pte-modules.patch Normal file
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@ -0,0 +1,20 @@
diff -durpN '--exclude-from=/home/davej/.exclude' /home/davej/src/kernel/git-trees/linux/mm/memory.c linux-dj/mm/memory.c
--- /home/davej/src/kernel/git-trees/linux/mm/memory.c 2013-02-26 14:41:18.591116577 -0500
+++ linux-dj/mm/memory.c 2013-02-28 20:04:37.678304092 -0500
@@ -57,6 +57,7 @@
#include <linux/swapops.h>
#include <linux/elf.h>
#include <linux/gfp.h>
+#include <linux/module.h>
#include <linux/migrate.h>
#include <linux/string.h>
@@ -719,6 +722,7 @@ static void print_bad_pte(struct vm_area
if (vma->vm_file && vma->vm_file->f_op)
print_symbol(KERN_ALERT "vma->vm_file->f_op->mmap: %s\n",
(unsigned long)vma->vm_file->f_op->mmap);
+ print_modules();
dump_stack();
add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
}

9
kernel.spec
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@ -638,6 +638,9 @@ Patch100: taint-vbox.patch
Patch110: vmbugon-warnon.patch
Patch200: debug-bad-pte-dmi.patch
Patch201: debug-bad-pte-modules.patch
Patch390: defaults-acpi-video.patch
Patch391: acpi-video-dos.patch
Patch396: acpi-sony-nonvs-blacklist.patch
@ -1292,6 +1295,9 @@ ApplyPatch taint-vbox.patch
ApplyPatch vmbugon-warnon.patch
ApplyPatch debug-bad-pte-dmi.patch
ApplyPatch debug-bad-pte-modules.patch
# Architecture patches
# x86(-64)
@ -2275,6 +2281,9 @@ fi
# ||----w |
# || ||
%changelog
* Thu Apr 11 2013 Dave Jones <davej@redhat.com>
- Print out some extra debug information when we hit bad page tables.
* Thu Apr 11 2013 Justin M. Forbes <jforbes@redhat.com> - 3.9.0-0.rc6.git2.1
- Linux v3.9-rc6-115-g7ee32a6
- libsas: use right function to alloc smp response (rhbz 949875)