| Message ID | 1493375719-47609-1-git-send-email-houtao1@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index f489a5a..1de93ba 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -734,7 +734,10 @@ int nfs_getattr(const struct path *path, struct kstat *stat, if (need_atime || nfs_need_revalidate_inode(inode)) { struct nfs_server *server = NFS_SERVER(inode); - nfs_readdirplus_parent_cache_miss(path->dentry); + if (!(server->flags & NFS_MOUNT_NOAC)) + nfs_readdirplus_parent_cache_miss(path->dentry); + else + nfs_readdirplus_parent_cache_hit(path->dentry); err = __nfs_revalidate_inode(server, inode); } else nfs_readdirplus_parent_cache_hit(path->dentry);
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> --- fs/nfs/inode.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)