freebsd-nq/sys/fs/nfsserver
Rick Macklem ee29e6f311 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
2021-07-16 15:01:03 -07:00
..
nfs_fha_new.c fs: clean up empty lines in .c and .h files 2020-09-01 21:18:40 +00:00
nfs_fha_new.h Re-organize the NFS file handle affinity code for the NFS server. 2020-04-14 00:01:26 +00:00
nfs_nfsdcache.c fs: clean up empty lines in .c and .h files 2020-09-01 21:18:40 +00:00
nfs_nfsdkrpc.c nfsd: fix replies from session cache for retried RPCs 2021-04-08 14:04:22 -07:00
nfs_nfsdport.c nfsd: Add sysctl to set maximum I/O size up to 1Mbyte 2021-07-16 15:01:03 -07:00
nfs_nfsdserv.c nfsd: Add sysctl to set maximum I/O size up to 1Mbyte 2021-07-16 15:01:03 -07:00
nfs_nfsdsocket.c nfsd: Fix when NFSERR_WRONGSEC may be replied to NFSv4 clients 2021-06-05 16:53:07 -07:00
nfs_nfsdstate.c nfsd: Add sysctl to set maximum I/O size up to 1Mbyte 2021-07-16 15:01:03 -07:00
nfs_nfsdsubs.c nfsd: Fix the failure return for non-fh NFSv4 operations 2021-06-02 15:28:07 -07:00