[PATCH] rmap: additional diagnostics in page_remove_rmap()
We seem to be hitting this assertion failure too often for it to be hardware bugs. Cc: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
parent
cd105df459
commit
ef2bf0dc86
|
@ -514,6 +514,13 @@ void page_add_file_rmap(struct page *page)
|
|||
void page_remove_rmap(struct page *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,
|
||||
|
|
Loading…
Reference in a new issue