提交 07b5ce8e 编写于 作者: S Scott Mayhew 提交者: Trond Myklebust

NFS: Make nfs_readdir revalidate less often

Make nfs_readdir revalidate only when we're at the beginning of the directory or
if the cached attributes have expired.
Signed-off-by: NScott Mayhew <smayhew@redhat.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
上级 43f291cd
......@@ -818,7 +818,7 @@ static int nfs_readdir(struct file *file, struct dir_context *ctx)
nfs_readdir_descriptor_t my_desc,
*desc = &my_desc;
struct nfs_open_dir_context *dir_ctx = file->private_data;
int res;
int res = 0;
dfprintk(FILE, "NFS: readdir(%s/%s) starting at cookie %llu\n",
dentry->d_parent->d_name.name, dentry->d_name.name,
......@@ -840,7 +840,8 @@ static int nfs_readdir(struct file *file, struct dir_context *ctx)
desc->plus = nfs_use_readdirplus(inode, ctx) ? 1 : 0;
nfs_block_sillyrename(dentry);
res = nfs_revalidate_mapping(inode, file->f_mapping);
if (ctx->pos == 0 || nfs_attribute_cache_expired(inode))
res = nfs_revalidate_mapping(inode, file->f_mapping);
if (res < 0)
goto out;
......
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