CVS commit: src/sys/nfs

[Jonathan Stone <jonathan%netbsd.org@localhost>]

Module Name:    src
Committed By:   jonathan
Date:           Sat Dec  6 02:48:35 UTC 2003

Modified Files:
        src/sys/nfs: nfs.h

Log Message:
Commit message for previous revision to sys/nfs/nfs.h:

Increase NFS_MAXRAHEAD to 32. With 32k read or write requests, that
amounts to 1 Mbyte of read-ahead, enough to cover about 10 ms latency
at gigabit Ethernet speeds.  Increase the table of nfsiod kthreads
(NFS_MAXASYNCDAEMON) from 20 to 128, to match the raised value of
NFS_MAXRAHEAD. (Making the limit dynamic requires   replacing the
compile-time array with a dynamic structure.)

Add a comment explaining that each read-ahead requires an I/O thread.

Wrap both parameters with an #ifdef <parameter>/#endif, to allow
hand-tuned values or (later) a kernel config-file option override.


To generate a diff of this commit:
cvs rdiff -r1.43 -r1.44 src/sys/nfs/nfs.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.