First commit.

1 files changed, 35 insertions, 0 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 9b8a01d941c..36e889cca24 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3016,6 +3016,35 @@ static inline int check_stack_guard_page(struct vm_area_struct *vma, unsigned lo
         return 0;
 }
 
+static inline void print_page_fault_info(struct mm_struct *mm,
+                unsigned long address, struct page *page)
+{
+        struct task_struct *ts = current;
+        char ts_name[TASK_COMM_LEN];
+        char mismatch[4];
+#if 0
+        struct file *file = mm->exe_file;
+        const unsigned char *name_null = "NULL";
+        const unsigned char *name =
+                (file) ?file->f_dentry->d_name.name : name_null;
+#endif
+
+        get_task_comm(ts_name, ts);
+        if (likely(ts->mm == mm))
+                mismatch[0] = '\0';
+        else
+                snprintf(mismatch, 4, "(M)");
+#if 0
+        printk("%s: cur: %15s  name: %15s  user_addr: 0x%12lx  pfn: %12lu  "
+                        "addr: 0x%13llx\n",
+                        __FUNCTION__, ts_name, name, address,
+                        page_to_pfn(page), page_to_phys(page));
+#endif
+        printk("%s: %3s %15s  laddr: 0x%12lx  pfn: %19lu  paddr: 0x%13llx\n",
+                        __FUNCTION__, mismatch, ts_name, address >> PAGE_SHIFT,
+                        page_to_pfn(page), page_to_phys(page) >> PAGE_SHIFT);
+}
+
 /*
  * We enter with non-exclusive mmap_sem (to exclude vma changes,
  * but allow concurrent faults), and pte mapped but not yet locked.
@@ -3066,6 +3095,9 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
 
         inc_mm_counter_fast(mm, MM_ANONPAGES);
         page_add_new_anon_rmap(page, vma, address);
+#if 0
+        print_page_fault_info(mm, address, page);
+#endif
 setpte:
         set_pte_at(mm, address, page_table, entry);
 
@@ -3075,6 +3107,9 @@ unlock:
         pte_unmap_unlock(page_table, ptl);
         return 0;
 release:
+#if 0
+        printk("%s: release label\n", __FUNCTION__);
+#endif
         mem_cgroup_uncharge_page(page);
         page_cache_release(page);
         goto unlock;