Don't bother with pte_chains for wired pages.


---

 page_remove_rmap-wli/fs/ramfs/inode.c |    2 ++
 page_remove_rmap-wli/mm/rmap.c        |    6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff -puN mm/rmap.c~wired_rmap mm/rmap.c
--- page_remove_rmap/mm/rmap.c~wired_rmap	2004-05-17 15:31:35.000000000 -0700
+++ page_remove_rmap-wli/mm/rmap.c	2004-05-17 15:33:18.000000000 -0700
@@ -239,7 +239,7 @@ page_add_rmap(struct page * page, pte_t 
 		BUG();
 #endif
 
-	if (!VALID_PAGE(page) || PageReserved(page))
+	if (!VALID_PAGE(page) || PageReserved(page) || PageWired(page))
 		return pte_chain;
 
 	pte_chain_lock(page);
@@ -318,7 +318,7 @@ void page_remove_rmap(struct page * page
 
 	if (!page || !ptep)
 		BUG();
-	if (!VALID_PAGE(page))
+	if (!VALID_PAGE(page) || PageWired(page))
 		return;
 
 	pte_chain_lock(page);
@@ -491,6 +491,8 @@ int try_to_unmap(struct page * page)
 	/* We need backing store to swap out a page. */
 	if (!page->mapping)
 		BUG();
+	if (PageWired(page))
+		return SWAP_FAIL;
 
 	if (PageDirect(page)) {
 		ret = try_to_unmap_one(page, page->pte.direct);
diff -puN fs/ramfs/inode.c~wired_rmap fs/ramfs/inode.c
--- page_remove_rmap/fs/ramfs/inode.c~wired_rmap	2004-05-17 15:33:26.000000000 -0700
+++ page_remove_rmap-wli/fs/ramfs/inode.c	2004-05-17 15:36:18.000000000 -0700
@@ -70,6 +70,7 @@ static int ramfs_readpage(struct file *f
 		kunmap(page);
 		flush_dcache_page(page);
 		SetPageUptodate(page);
+		SetPageWired(page);
 	}
 	UnlockPage(page);
 	return 0;
@@ -82,6 +83,7 @@ static int ramfs_prepare_write(struct fi
 		memset(addr, 0, PAGE_CACHE_SIZE);
 		flush_dcache_page(page);
 		SetPageUptodate(page);
+		SetPageWired(page);
 	}
 	SetPageDirty(page);
 	return 0;

_