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NFS: support large reads and writes on the wire

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Most NFS server implementations allow up to 64KB reads and writes on the
 wire.  The Solaris NFS server allows up to a megabyte, for instance.

 Now the Linux NFS client supports transfer sizes up to 1MB, too.  This will
 help reduce protocol and context switch overhead on read/write intensive NFS
 workloads, and support larger atomic read and write operations on servers
 that support them.

 Test-plan:
 Connectathon and iozone on mount point with wsize=rsize>32768 over TCP.
 Tests with NFS over UDP to verify the maximum RPC payload size cap.

 Signed-off-by: Chuck Lever <cel@netapp.com>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
2005-11-30 18:09:02 -05:00
committed by Trond Myklebust
parent 325cfed9ae
commit 40859d7ee6
8 changed files with 91 additions and 53 deletions
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fs/nfs/read.c
+3 -3
View File
@@ -83,7 +83,7 @@ static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode,
int result;
struct nfs_read_data *rdata;
rdata = nfs_readdata_alloc();
rdata = nfs_readdata_alloc(1);
if (!rdata)
return -ENOMEM;
@@ -283,7 +283,7 @@ static int nfs_pagein_multi(struct list_head *head, struct inode *inode)
nbytes = req->wb_bytes;
for(;;) {
data = nfs_readdata_alloc();
data = nfs_readdata_alloc(1);
if (!data)
goto out_bad;
INIT_LIST_HEAD(&data->pages);
@@ -339,7 +339,7 @@ static int nfs_pagein_one(struct list_head *head, struct inode *inode)
if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE)
return nfs_pagein_multi(head, inode);
data = nfs_readdata_alloc();
data = nfs_readdata_alloc(NFS_SERVER(inode)->rpages);
if (!data)
goto out_bad;