Date: Mon, 14 Apr 2008 20:59:28 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Alfred Perlstein <alfred@freebsd.org> Cc: nawfal@googlemail.com, freebsd-stable@freebsd.org, Robert Blayzor <rblayzor.bulk@inoc.net> Subject: Re: NFS and /etc/exports Message-ID: <20080415015928.GB59360@dan.emsphone.com> In-Reply-To: <20080414232851.GU95731@elvis.mu.org> References: <1208170926.12349.20.camel@nawfal-desktop> <1886249E-54FF-4EFE-A7B9-C6AB2488EB4D@inoc.net> <20080414232851.GU95731@elvis.mu.org>
next in thread | previous in thread | raw e-mail | index | archive | help
In the last episode (Apr 14), Alfred Perlstein said:
> * Robert Blayzor <rblayzor.bulk@inoc.net> [080414 06:07] wrote:
> > On Apr 14, 2008, at 7:02 AM, Nawfal bin Mohmad Rouyan wrote:
> > >I'm using TCP and the entry in /etc/fstab on all clients is as below:
> > >
> > >build:/usr/ports /usr/ports nfs tcp,intr,nfsv3,-w=32768,-r=32768,rw,noauto 0 0
> > >build:/usr/src /usr/src nfs tcp,intr,nfsv3,-w=32768,-r=32768,rw,noauto 0 0
> > >build:/usr/obj /usr/obj nfs tcp,intr,nfsv3,-w=32768,-r=32768,rw,noauto 0 0
> >
> > Are -r and -w really needed/useful for TCP mounts?
>
> yes.
This is interesting: according to mountnfs() in nfs_vfsops.c, those are
already the kernel defaults:
if ((argp->flags & NFSMNT_NFSV3) && argp->sotype == SOCK_STREAM) {
nmp->nm_wsize = nmp->nm_rsize = NFS_MAXDATA;
} else {
nmp->nm_wsize = NFS_WSIZE;
nmp->nm_rsize = NFS_RSIZE;
}
$ grep nfs_maxdata /sys/nfs/*
/sys/nfs/nfsproto.h:#define NFS_MAXDATA 32768
But it looks like /sbin/mount_nfs always overrides them to NFS_WSIZE
and NFS_RSIZE (both 8K) in its nfsdefargs struct.
--
Dan Nelson
dnelson@allantgroup.com
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20080415015928.GB59360>