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| author |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-10-14 19:16:07 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-10-14 19:23:17 -0400 |
| commit | 4704f0e274829e3af00737d2d9adace2d71a9605 (patch) | |
| tree | 048404f927dc210f1d7c695cb39e28e4e7d49030 /include/linux/nfs_xdr.h | |
| parent | NFS: Changes to inode->i_nlinks must set the NFS_INO_INVALID_ATTR flag (diff) | |
| download | linux-dev-4704f0e274829e3af00737d2d9adace2d71a9605.tar.xz linux-dev-4704f0e274829e3af00737d2d9adace2d71a9605.zip | |
NFS: Fix the resolution problem with nfs_inode_attrs_need_update()
It appears that 'jiffies' timestamps do not have high enough resolution for
nfs_inode_attrs_need_update(). One problem is that a GETATTR can be
launched within < 1 jiffy of the last operation that updated the attribute.
Another problem is that RPC calls can take < 1 jiffy to execute.
We can fix this by switching the variables to use a simple global counter
that gets incremented every time we start another GETATTR call.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/nfs_xdr.h')
| -rw-r--r-- | include/linux/nfs_xdr.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 6ee6ae3f095c..c1c31acb8a2b 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -56,6 +56,7 @@ struct nfs_fattr { __u64 change_attr; /* NFSv4 change attribute */ __u64 pre_change_attr;/* pre-op NFSv4 change attribute */ unsigned long time_start; + unsigned long gencount; }; #define NFS_ATTR_WCC 0x0001 /* pre-op WCC data */ |