源代码Linux2.4.0/mm/swap_state.c，26行，哪位大神能告诉我这个结构体是什么意思啊。

Question

static int swap_writepage(struct page *page)
{
rw_swap_page(WRITE, page, 0);
return 0;
}

static struct address_space_operations swap_aops = {
writepage: swap_writepage,
sync_page: block_sync_page,
};

struct address_space swapper_space = {
LIST_HEAD_INIT(swapper_space.clean_pages),
LIST_HEAD_INIT(swapper_space.dirty_pages),
LIST_HEAD_INIT(swapper_space.locked_pages),
0, /* nrpages */
&swap_aops,
};

Answer 1

LIST_HEAD_INIT(swapper_space.clean_pages), //干净的页，也就是没有更改的页
LIST_HEAD_INIT(swapper_space.dirty_pages), //脏页，也就是需要更新的页
LIST_HEAD_INIT(swapper_space.locked_pages), //锁定的页，这些页不能交换