On Wed, Jan 04, 2006 at 04:16:40PM -0800, Andrew Morton wrote:
> Dave Jones <[email protected]> wrote:
> >
> > + printk (KERN_EMERG "Eeek! page_mapcount(page) went negative! (%d)\n", page->_mapcount);
>
> page_mapcount(page);
>
> > + printk (KERN_EMERG " page->flags = %x\n", page->flags);
>
> %lx
>
> > + printk (KERN_EMERG " page->count = %x\n", page->_count);
>
> page_count(page);
Ugh, almost an error per line. I suck.
Dave
--- linux-2.6.14/mm/rmap.c~ 2006-01-03 08:53:32.000000000 -0500
+++ linux-2.6.14/mm/rmap.c 2006-01-03 08:58:19.000000000 -0500
@@ -484,6 +484,13 @@ void page_remove_rmap(struct page *page)
BUG_ON(PageReserved(page));
if (atomic_add_negative(-1, &page->_mapcount)) {
+ if (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_ON(page_mapcount(page) < 0);
/*
* It would be tidy to reset the PageAnon mapping here,
-
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