I made mistake in uninlining patch: we need to read _mapcount of the page which caller pointed us to, not head page.
It's fixlet for "mm: uninline slowpath of page_mapcount()" Signed-off-by: Kirill A. Shutemov <[email protected]> --- mm/util.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/util.c b/mm/util.c index 22dae03a4ae1..5be2a4bdf76b 100644 --- a/mm/util.c +++ b/mm/util.c @@ -411,8 +411,8 @@ int __page_mapcount(struct page *page) { int ret; - page = compound_head(page); ret = atomic_read(&page->_mapcount) + 1; + page = compound_head(page); ret += atomic_read(compound_mapcount_ptr(page)) + 1; if (PageDoubleMap(page)) ret--; -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
