NFS: Add a count of the number of unstable writes carried by an inode
[linux-2.6.git] / fs / nfs / write.c
index 09e9709..dc08a6f 100644 (file)
@@ -438,6 +438,7 @@ nfs_mark_request_commit(struct nfs_page *req)
        radix_tree_tag_set(&nfsi->nfs_page_tree,
                        req->wb_index,
                        NFS_PAGE_TAG_COMMIT);
+       nfsi->ncommit++;
        spin_unlock(&inode->i_lock);
        inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
        inc_bdi_stat(req->wb_page->mapping->backing_dev_info, BDI_RECLAIMABLE);
@@ -573,11 +574,15 @@ static int
 nfs_scan_commit(struct inode *inode, struct list_head *dst, pgoff_t idx_start, unsigned int npages)
 {
        struct nfs_inode *nfsi = NFS_I(inode);
+       int ret;
 
        if (!nfs_need_commit(nfsi))
                return 0;
 
-       return nfs_scan_list(nfsi, dst, idx_start, npages, NFS_PAGE_TAG_COMMIT);
+       ret = nfs_scan_list(nfsi, dst, idx_start, npages, NFS_PAGE_TAG_COMMIT);
+       if (ret > 0)
+               nfsi->ncommit -= ret;
+       return ret;
 }
 #else
 static inline int nfs_need_commit(struct nfs_inode *nfsi)
@@ -642,9 +647,10 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
                spin_lock(&inode->i_lock);
        }
 
-       if (nfs_clear_request_commit(req))
-               radix_tree_tag_clear(&NFS_I(inode)->nfs_page_tree,
-                               req->wb_index, NFS_PAGE_TAG_COMMIT);
+       if (nfs_clear_request_commit(req) &&
+                       radix_tree_tag_clear(&NFS_I(inode)->nfs_page_tree,
+                               req->wb_index, NFS_PAGE_TAG_COMMIT) != NULL)
+               NFS_I(inode)->ncommit--;
 
        /* Okay, the request matches. Update the region */
        if (offset < req->wb_offset) {