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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2018-03-05 12:03:00 -0500 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2018-09-30 15:35:17 -0400 |
| commit | 8d8928d87960d71f898767185b8c0e4ce3de3cbe (patch) | |
| tree | 4d512261635e3b1560160af32cf30e04fdc0f643 /include/linux/nfs_fs_sb.h | |
| parent | 80f42368868e082c5c1dcca6ada94f6b8eab4991 (diff) | |
| download | lwn-8d8928d87960d71f898767185b8c0e4ce3de3cbe.tar.gz lwn-8d8928d87960d71f898767185b8c0e4ce3de3cbe.zip | |
NFSv3: Improve NFSv3 performance when server returns no post-op attributes
When the server fails to return post-op attributes, the client's
attempt to place read data directly in the page cache fails, and
so we have to do an extra copy in order to realign the data with
page borders.
This patch attempts to detect servers that don't return post-op
attributes on read (e.g. for pNFS) and adjusts the placement
calculation accordingly.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'include/linux/nfs_fs_sb.h')
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index bf39d9c92201..0fc0b9135d46 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -228,6 +228,9 @@ struct nfs_server { unsigned short mountd_port; unsigned short mountd_protocol; struct rpc_wait_queue uoc_rpcwaitq; + + /* XDR related information */ + unsigned int read_hdrsize; }; /* Server capabilities */ |