badpage: KERN_ALERT BUG instead of KERN_EMERG

bad_page() and rmap Eeek messages have said KERN_EMERG for a few years,
which I've followed in print_bad_pte().  These are serious system errors,
on a par with BUGs, but they're not quite emergencies, and we do our best
to carry on: say KERN_ALERT "BUG: " like the x86 oops does.

And remove the "Trying to fix it up, but a reboot is needed" line: it's
not untrue, but I hope the KERN_ALERT "BUG: " conveys as much.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 5 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d1a80f652c6f..d531e8ef9984 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -237,8 +237,8 @@ static void bad_page(struct page *page)
                         goto out;
                 }
                 if (nr_unshown) {
-                        printk(KERN_EMERG
-                                "Bad page state: %lu messages suppressed\n",
+                        printk(KERN_ALERT
+                              "BUG: Bad page state: %lu messages suppressed\n",
                                 nr_unshown);
                         nr_unshown = 0;
                 }
@@ -247,13 +247,12 @@ static void bad_page(struct page *page)
         if (nr_shown++ == 0)
                 resume = jiffies + 60 * HZ;
 
-        printk(KERN_EMERG "Bad page state in process %s  pfn:%05lx\n",
+        printk(KERN_ALERT "BUG: Bad page state in process %s  pfn:%05lx\n",
                 current->comm, page_to_pfn(page));
-        printk(KERN_EMERG
+        printk(KERN_ALERT
                 "page:%p flags:%p count:%d mapcount:%d mapping:%p index:%lx\n",
                 page, (void *)page->flags, page_count(page),
                 page_mapcount(page), page->mapping, page->index);
-        printk(KERN_EMERG "Trying to fix it up, but a reboot is needed\n");
 
         dump_stack();
 out: