tree a0cbecb6dc4b59e6323fe5236caa37610f1e8223
parent 5c737cb29977896eb0f373d3adbcdea73b815808
author Hou Tao <houtao1@huawei.com> 1493375719 +0800
committer Trond Myklebust <trond.myklebust@primarydata.com> 1494003692 -0400

NFS: always treat the invocation of nfs_getattr as cache hit when noac is on

When using 'ls -l' to display a large directory, if noac option is used,
in function nfs_getattr() nfs_need_revalidate_inode() will always be true
for NFSv3 and the nfs_entry cache of the directory will be flushed. The
flush will lead to a fully reread of the directory entries from server.

To prevent the unnecessary RPCs, we need to check whether or not the
noac option is used, and always report the invocation of nfs_getattr()
as cache hit instead cache miss when it's on.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>