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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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5
include/linux/sunrpc/xdr.h
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@@ -134,11 +134,6 @@ xdr_adjust_iovec(struct kvec *iov, u32 *p)
return iov->iov_len = ((u8 *) p - (u8 *) iov->iov_base);
}
/*
* Maximum number of iov's we use.
*/
#define MAX_IOVEC (12)
/*
* XDR buffer helper functions
*/