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authorTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 17:16:30 +0000
committerTrond Myklebust <Trond.Myklebust@netapp.com>2005-06-22 16:07:39 -0400
commitc6a556b88adfacd2af90be84357c8165d716c27d (patch)
treeb63d477180052d3d1edabffb51f3fdfe4f699866 /fs/nfs/pagelist.c
parentab0a3dbedc51037f3d2e22ef67717a987b3d15e2 (diff)
downloadop-kernel-dev-c6a556b88adfacd2af90be84357c8165d716c27d.zip
op-kernel-dev-c6a556b88adfacd2af90be84357c8165d716c27d.tar.gz
[PATCH] NFS: Make searching and waiting on busy writeback requests more efficient.
Basically copies the VFS's method for tracking writebacks and applies it to the struct nfs_page. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pagelist.c')
-rw-r--r--fs/nfs/pagelist.c29
1 files changed, 28 insertions, 1 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 80777f9..356a33b 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -112,6 +112,33 @@ void nfs_unlock_request(struct nfs_page *req)
}
/**
+ * nfs_set_page_writeback_locked - Lock a request for writeback
+ * @req:
+ */
+int nfs_set_page_writeback_locked(struct nfs_page *req)
+{
+ struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode);
+
+ if (!nfs_lock_request(req))
+ return 0;
+ radix_tree_tag_set(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK);
+ return 1;
+}
+
+/**
+ * nfs_clear_page_writeback - Unlock request and wake up sleepers
+ */
+void nfs_clear_page_writeback(struct nfs_page *req)
+{
+ struct nfs_inode *nfsi = NFS_I(req->wb_context->dentry->d_inode);
+
+ spin_lock(&nfsi->req_lock);
+ radix_tree_tag_clear(&nfsi->nfs_page_tree, req->wb_index, NFS_PAGE_TAG_WRITEBACK);
+ spin_unlock(&nfsi->req_lock);
+ nfs_unlock_request(req);
+}
+
+/**
* nfs_clear_request - Free up all resources allocated to the request
* @req:
*
@@ -301,7 +328,7 @@ nfs_scan_list(struct list_head *head, struct list_head *dst,
if (req->wb_index > idx_end)
break;
- if (!nfs_lock_request(req))
+ if (!nfs_set_page_writeback_locked(req))
continue;
nfs_list_remove_request(req);
nfs_list_add_request(req, dst);
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