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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-17 22:04:26 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-01-31 19:28:07 -0500
commit536e43d12b9517bbbf6114cd1a12be27857a4d7a (patch)
treea40424a430fd651fe7b35232717f2201c608059a /fs/nfs/inode.c
parent48c22eb21071a3524f8b6e587371be35b5e86969 (diff)
downloadlinux-stericsson-536e43d12b9517bbbf6114cd1a12be27857a4d7a.tar.gz
NFS: Optimise away unnecessary setattrs for open(O_TRUNC);
Currently, we will correctly optimise away a truncate that doesn't change the file size. However, in the case of open(O_TRUNC), we also want to optimise away the time changes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/inode.c')
-rw-r--r--fs/nfs/inode.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 577ad5a72a24..65486e652943 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -402,7 +402,7 @@ out_no_inode:
goto out;
}
-#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
+#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN)
int
nfs_setattr(struct dentry *dentry, struct iattr *attr)
@@ -424,7 +424,7 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr)
/* Optimization: if the end result is no change, don't RPC */
attr->ia_valid &= NFS_VALID_ATTRS;
- if ((attr->ia_valid & ~ATTR_FILE) == 0)
+ if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
return 0;
/* Write all dirty data */