The patch titled
move rmap BUG_ON outside DEBUG_VM
has been added to the -mm tree. Its filename is
move-rmap-bug_on-outside-debug_vm.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: move rmap BUG_ON outside DEBUG_VM
From: Dave Jones <davej@xxxxxxxxxx>
We have a persistent dribble of reports of this BUG triggering. Its extended
diagnostics were recently made conditional on CONFIG_DEBUG_VM, which was a bad
idea - we want to know about it.
Signed-off-by: Dave Jones <davej@xxxxxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Cc: Hugh Dickins <hugh@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/rmap.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff -puN mm/rmap.c~move-rmap-bug_on-outside-debug_vm mm/rmap.c
--- a/mm/rmap.c~move-rmap-bug_on-outside-debug_vm
+++ a/mm/rmap.c
@@ -576,15 +576,14 @@ void page_add_file_rmap(struct page *pag
void page_remove_rmap(struct page *page)
{
if (atomic_add_negative(-1, &page->_mapcount)) {
-#ifdef CONFIG_DEBUG_VM
if (unlikely(page_mapcount(page) < 0)) {
printk (KERN_EMERG "Eeek! page_mapcount(page) went negative! (%d)\n", page_mapcount(page));
printk (KERN_EMERG " page->flags = %lx\n", page->flags);
printk (KERN_EMERG " page->count = %x\n", page_count(page));
printk (KERN_EMERG " page->mapping = %p\n", page->mapping);
+ BUG();
}
-#endif
- BUG_ON(page_mapcount(page) < 0);
+
/*
* It would be tidy to reset the PageAnon mapping here,
* but that might overwrite a racing page_add_anon_rmap
_
Patches currently in -mm which might be from davej@xxxxxxxxxx are
remove-silly-messages-from-input-layer.patch
git-netdev-all.patch
move-rmap-bug_on-outside-debug_vm.patch
-
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