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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
commit 77c62fd3ed
3 changed files with 93 additions and 0 deletions
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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);
}