NFS: prepare coalesce testing for directio
The coalesce code made assumptions that will no longer be true once
non-page aligned io occurs. This introduces no change in
current behavior, but allows for more general situations to come.
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index b3a0c01..4da05e4 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1082,6 +1082,10 @@
{
BUG_ON(pgio->pg_lseg != NULL);
+ if (req->wb_offset != req->wb_pgbase) {
+ nfs_pageio_reset_read_mds(pgio);
+ return;
+ }
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
req->wb_context,
req_offset(req),
@@ -1100,6 +1104,10 @@
{
BUG_ON(pgio->pg_lseg != NULL);
+ if (req->wb_offset != req->wb_pgbase) {
+ nfs_pageio_reset_write_mds(pgio);
+ return;
+ }
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
req->wb_context,
req_offset(req),
