From e468bae97d243fe0e1515abaa1f7d0edf1476ad0 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri, 13 Jun 2008 13:25:22 -0400
Subject: NFS: Allow redirtying of a completed unstable write.
Currently, if an unstable write completes, we cannot redirty the page in
order to reflect a new change in the page data until after we've sent a
COMMIT request.
This patch allows a page rewrite to proceed without the unnecessary COMMIT
step, putting it immediately back onto the dirty page list, undoing the
VM unstable write accounting, and removing the NFS_PAGE_TAG_COMMIT tag from
the NFS radix tree.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
include/linux/nfs_page.h | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
(limited to 'include/linux/nfs_page.h')
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index a1676e19e49..3c60685d972 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -27,9 +27,12 @@
/*
* Valid flags for a dirty buffer
*/
-#define PG_BUSY 0
-#define PG_NEED_COMMIT 1
-#define PG_NEED_RESCHED 2
+enum {
+ PG_BUSY = 0,
+ PG_CLEAN,
+ PG_NEED_COMMIT,
+ PG_NEED_RESCHED,
+};
struct nfs_inode;
struct nfs_page {
--
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