Hi, all in kernel. The page->_count is the page frame's usage count. When page is allocated, the page->_cout will be set 1.
After be allocated from buddy system, the page will be used by process. get_page and put_page/put_page_testzero will used in pairs. is it right? When the page is reclaimed to buddy system, the page->_count should be 0. However, Because the initialization of page->_count is 1, get_page() and put_page() is called in pairs, I coufused how page->_count will be 0? Thanks. -- 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/
