1 files changed, 20 insertions, 7 deletions

diff --git a/mm/debug.c b/mm/debug.c
index cdacba12e09a..0abb987dad9b 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -17,7 +17,7 @@
 
 #include "internal.h"
 
-char *migrate_reason_names[MR_TYPES] = {
+const char *migrate_reason_names[MR_TYPES] = {
         "compaction",
         "memory_failure",
         "memory_hotplug",
@@ -44,6 +44,7 @@ const struct trace_print_flags vmaflag_names[] = {
 
 void __dump_page(struct page *page, const char *reason)
 {
+        struct address_space *mapping = page_mapping(page);
         bool page_poisoned = PagePoisoned(page);
         int mapcount;
 
@@ -53,7 +54,7 @@ void __dump_page(struct page *page, const char *reason)
          * dump_page() when detected.
          */
         if (page_poisoned) {
-                pr_emerg("page:%px is uninitialized and poisoned", page);
+                pr_warn("page:%px is uninitialized and poisoned", page);
                 goto hex_only;
         }
 
@@ -64,27 +65,39 @@ void __dump_page(struct page *page, const char *reason)
          */
         mapcount = PageSlab(page) ? 0 : page_mapcount(page);
 
-        pr_emerg("page:%px count:%d mapcount:%d mapping:%px index:%#lx",
+        pr_warn("page:%px count:%d mapcount:%d mapping:%px index:%#lx",
                   page, page_ref_count(page), mapcount,
                   page->mapping, page_to_pgoff(page));
         if (PageCompound(page))
                 pr_cont(" compound_mapcount: %d", compound_mapcount(page));
         pr_cont("\n");
+        if (PageAnon(page))
+                pr_warn("anon ");
+        else if (PageKsm(page))
+                pr_warn("ksm ");
+        else if (mapping) {
+                pr_warn("%ps ", mapping->a_ops);
+                if (mapping->host->i_dentry.first) {
+                        struct dentry *dentry;
+                        dentry = container_of(mapping->host->i_dentry.first, struct dentry, d_u.d_alias);
+                        pr_warn("name:\"%pd\" ", dentry);
+                }
+        }
         BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS + 1);
 
-        pr_emerg("flags: %#lx(%pGp)\n", page->flags, &page->flags);
+        pr_warn("flags: %#lx(%pGp)\n", page->flags, &page->flags);
 
 hex_only:
-        print_hex_dump(KERN_ALERT, "raw: ", DUMP_PREFIX_NONE, 32,
+        print_hex_dump(KERN_WARNING, "raw: ", DUMP_PREFIX_NONE, 32,
                         sizeof(unsigned long), page,
                         sizeof(struct page), false);
 
         if (reason)
-                pr_alert("page dumped because: %s\n", reason);
+                pr_warn("page dumped because: %s\n", reason);
 
 #ifdef CONFIG_MEMCG
         if (!page_poisoned && page->mem_cgroup)
-                pr_alert("page->mem_cgroup:%px\n", page->mem_cgroup);
+                pr_warn("page->mem_cgroup:%px\n", page->mem_cgroup);
 #endif
 }