FS: Use stable writes when not doing a bulk flush

If we're only doing a single write, and there are no other unstable
writes being queued up, we might want to just flip to using a stable
write RPC call.

Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 23e794410669..fd85618149a1 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -223,6 +223,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
         desc->pg_count = 0;
         desc->pg_bsize = bsize;
         desc->pg_base = 0;
+        desc->pg_moreio = 0;
         desc->pg_inode = inode;
         desc->pg_doio = doio;
         desc->pg_ioflags = io_flags;
@@ -335,9 +336,11 @@ int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
                            struct nfs_page *req)
 {
         while (!nfs_pageio_do_add_request(desc, req)) {
+                desc->pg_moreio = 1;
                 nfs_pageio_doio(desc);
                 if (desc->pg_error < 0)
                         return 0;
+                desc->pg_moreio = 0;
         }
         return 1;
 }