git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-23 05:56:14 -04:00
Code Issues Packages Projects Releases Wiki Activity

NFS: support large reads and writes on the wire

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

29
include/linux/nfs_xdr.h
View File

@@ -4,6 +4,16 @@
#include <linux/sunrpc/xprt.h>
#include <linux/nfsacl.h>
/*
* To change the maximum rsize and wsize supported by the NFS client, adjust
* NFS_MAX_FILE_IO_SIZE. 64KB is a typical maximum, but some servers can
* support a megabyte or more. The default is left at 4096 bytes, which is
* reasonable for NFS over UDP.
*/
#define NFS_MAX_FILE_IO_SIZE (1048576U)
#define NFS_DEF_FILE_IO_SIZE (4096U)
#define NFS_MIN_FILE_IO_SIZE (1024U)
struct nfs4_fsid {
__u64 major;
__u64 minor;
@@ -215,12 +225,6 @@ struct nfs4_delegreturnargs {
/*
* Arguments to the read call.
*/
#define NFS_READ_MAXIOV (9U)
#if (NFS_READ_MAXIOV > (MAX_IOVEC -2))
#error "NFS_READ_MAXIOV is too large"
#endif
struct nfs_readargs {
struct nfs_fh * fh;
struct nfs_open_context *context;
@@ -239,11 +243,6 @@ struct nfs_readres {
/*
* Arguments to the write call.
*/
#define NFS_WRITE_MAXIOV (9U)
#if (NFS_WRITE_MAXIOV > (MAX_IOVEC -2))
#error "NFS_WRITE_MAXIOV is too large"
#endif
struct nfs_writeargs {
struct nfs_fh * fh;
struct nfs_open_context *context;
@@ -674,6 +673,8 @@ struct nfs4_server_caps_res {
struct nfs_page;
#define NFS_PAGEVEC_SIZE (8U)
struct nfs_read_data {
int flags;
struct rpc_task task;
@@ -682,13 +683,14 @@ struct nfs_read_data {
struct nfs_fattr fattr; /* fattr storage */
struct list_head pages; /* Coalesced read requests */
struct nfs_page *req; /* multi ops per nfs_page */
struct page *pagevec[NFS_READ_MAXIOV];
struct page **pagevec;
struct nfs_readargs args;
struct nfs_readres res;
#ifdef CONFIG_NFS_V4
unsigned long timestamp; /* For lease renewal */
#endif
void (*complete) (struct nfs_read_data *, int);
struct page *page_array[NFS_PAGEVEC_SIZE + 1];
};
struct nfs_write_data {
@@ -700,13 +702,14 @@ struct nfs_write_data {
struct nfs_writeverf verf;
struct list_head pages; /* Coalesced requests we wish to flush */
struct nfs_page *req; /* multi ops per nfs_page */
struct page *pagevec[NFS_WRITE_MAXIOV];
struct page **pagevec;
struct nfs_writeargs args; /* argument struct */
struct nfs_writeres res; /* result struct */
#ifdef CONFIG_NFS_V4
unsigned long timestamp; /* For lease renewal */
#endif
void (*complete) (struct nfs_write_data *, int);
struct page *page_array[NFS_PAGEVEC_SIZE + 1];
};
struct nfs_access_entry;