diff options
| author | Rick Macklem <rmacklem@FreeBSD.org> | 2021-07-16 22:01:03 +0000 |
|---|---|---|
| committer | Rick Macklem <rmacklem@FreeBSD.org> | 2021-07-16 22:01:03 +0000 |
| commit | ee29e6f31111ea3cd490248987f2f2ec412eb0bb (patch) | |
| tree | b3377e6bad98ec10e43bf178abb3cb4153534510 /sys/fs/nfs/nfs.h | |
| parent | db4d2d7222ee1c03ade4eb3b82e263ce5c94cf61 (diff) | |
nfsd: Add sysctl to set maximum I/O size up to 1Mbyte
Since MAXPHYS now allows the FreeBSD NFS client
to do 1Mbyte I/O operations, add a sysctl called vfs.nfsd.srvmaxio
so that the maximum NFS server I/O size can be set up to 1Mbyte.
The Linux NFS client can also do 1Mbyte I/O operations.
The default of 128Kbytes for the maximum I/O size has
not been changed for two reasons:
- kern.ipc.maxsockbuf must be increased to support 1Mbyte I/O
- The limited benchmarking I can do actually shows a drop in I/O rate
when the I/O size is above 256Kbytes.
However, daveb@spectralogic.com reports seeing an increase
in I/O rate for the 1Mbyte I/O size vs 128Kbytes using a Linux client.
Reviewed by: asomers
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D30826
Diffstat (limited to 'sys/fs/nfs/nfs.h')
| -rw-r--r-- | sys/fs/nfs/nfs.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/fs/nfs/nfs.h b/sys/fs/nfs/nfs.h index 272b8dbfee22..1a29a7e1d6ec 100644 --- a/sys/fs/nfs/nfs.h +++ b/sys/fs/nfs/nfs.h @@ -156,7 +156,7 @@ (t).tv_sec = time.tv_sec; (t).tv_nsec = 1000 * time.tv_usec; } while (0) #define NFS_SRVMAXDATA(n) \ (((n)->nd_flag & (ND_NFSV3 | ND_NFSV4)) ? \ - NFS_SRVMAXIO : NFS_V2MAXDATA) + nfs_srvmaxio : NFS_V2MAXDATA) #define NFS64BITSSET 0xffffffffffffffffull #define NFS64BITSMINUS1 0xfffffffffffffffeull |