NFS cleanup: speed up nfs_scan_commit using radix tree tags

Add a tag for requests that are waiting for a COMMIT

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 754066cc9146..0f779ca12ec3 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -462,6 +462,9 @@ nfs_mark_request_commit(struct nfs_page *req)
         nfs_list_add_request(req, &nfsi->commit);
         nfsi->ncommit++;
         set_bit(PG_NEED_COMMIT, &(req)->wb_flags);
+        radix_tree_tag_set(&nfsi->nfs_page_tree,
+                        req->wb_index,
+                        NFS_PAGE_TAG_COMMIT);
         spin_unlock(&nfsi->req_lock);
         inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
         __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
@@ -575,7 +578,8 @@ nfs_scan_commit(struct inode *inode, struct list_head *dst, pgoff_t idx_start, u
         int res = 0;
 
         if (nfsi->ncommit != 0) {
-                res = nfs_scan_list(nfsi, &nfsi->commit, dst, idx_start, npages);
+                res = nfs_scan_list(nfsi, dst, idx_start, npages,
+                                NFS_PAGE_TAG_COMMIT);
                 nfsi->ncommit -= res;
                 if ((nfsi->ncommit == 0) != list_empty(&nfsi->commit))
                         printk(KERN_ERR "NFS: desynchronized value of nfs_i.ncommit.\n");