[PATCH] give NFS client a "set_page_dirty" address space op.

[Chuck Lever]

Description:
  The default set_page_dirty address space op is too heavyweight for NFS,
  which doesn't use buffers.

Apply against:
  2.5.49

Test status:
  Passes Connectathon '02, fsx, and other stress tests on a UP HIGHMEM
  system.

diff -Naur 01-kmap-atomic/fs/nfs/file.c 02-set_page_dirty/fs/nfs/file.c
--- 01-kmap-atomic/fs/nfs/file.c	Fri Nov 22 16:40:51 2002
+++ 02-set_page_dirty/fs/nfs/file.c	Mon Nov 25 13:19:44 2002
@@ -168,6 +168,7 @@
 struct address_space_operations nfs_file_aops = {
 	.readpage = nfs_readpage,
 	.readpages = nfs_readpages,
+	.set_page_dirty = __set_page_dirty_nobuffers,
 	.writepage = nfs_writepage,
 	.writepages = nfs_writepages,
 	.prepare_write = nfs_prepare_write,