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Commit b4b1eadf authored by Trond Myklebust's avatar Trond Myklebust
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NFS: Don't force page cache revalidations when holding a delegation 



If we're holding a delegation, then we already know that our
page cache is valid.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent e144cbcc

fs/nfs/inode.c

+10 −3
Original line number Diff line number Diff line
@@ -870,6 +870,15 @@ static int nfs_invalidate_mapping(struct inode *inode, struct address_space *map 
	return 0;

}



static bool nfs_mapping_need_revalidate_inode(struct inode *inode)

{

	if (nfs_have_delegated_attributes(inode))

		return false;

	return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE)

		|| nfs_attribute_timeout(inode)

		|| NFS_STALE(inode);

}



/**

 * nfs_revalidate_mapping - Revalidate the pagecache

 * @inode - pointer to host inode
@@ -880,9 +889,7 @@ int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) 
	struct nfs_inode *nfsi = NFS_I(inode);

	int ret = 0;



	if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)

			|| nfs_attribute_cache_expired(inode)

			|| NFS_STALE(inode)) {

	if (nfs_mapping_need_revalidate_inode(inode)) {

		ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);

		if (ret < 0)

			goto out;