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Date:      Thu, 7 Apr 2005 13:29:48 -0700
From:      Brooks Davis <brooks@one-eyed-alien.net>
To:        bob@a1poweruser.com
Cc:        stable@freebsd.org
Subject:   Re: nfsiod tasks started in error
Message-ID:  <20050407202947.GB21190@odin.ac.hmc.edu>
In-Reply-To: <MIEPLLIBMLEEABPDBIEGKELKHDAA.bob@a1poweruser.com>
References:  <MIEPLLIBMLEEABPDBIEGKELKHDAA.bob@a1poweruser.com>

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On Thu, Apr 07, 2005 at 04:11:55PM -0400, bob@a1poweruser.com wrote:
> During sysinstall answered no to the server and client nfs questions
> and after installed completed and system rebooted I see task
> nfsiod1,2,3,4 running in output of ps ax command.  This was not the
> case in any of the 4.x releases. This can be looked upon as a
> security leak. This may be a error in the new boot up process. This
> was first reported 1/16/2004 in 5.2 RC2 as Problem Report kern/61438
> and again in 5.3 as Problem Report kern/79539
>=20
> I tried to run /usr/local/etc/rc.d/killnfs.sh script to kill these
> unwanted tasks but that does not work.
>=20
> Any suggestions on how I can kill these bogus nfs tasks as part of
> boot up or what to change in the boot up process so these tasks
> don't get started in the first place? Doing a manual recompile of
> the kernel to remove the nfs statements is not a viable solution.

nfsiod now runs as a kernel process and is control by these sysctls:

vfs.nfs.iodmaxidle: 120
vfs.nfs.iodmin: 4
vfs.nfs.iodmax: 20

It looks like setting vfs.nfs.iodmin=3D0 and then klling them off works.
We probably should think about changing the default to 0 and setting
appropriate values via /etc/rc.d/nfs.  Over all, I can't say this is a
very high priority though patches would certaintly be accepted.

-- Brooks

--=20
Any statement of the form "X is the one, true Y" is FALSE.
PGP fingerprint 655D 519C 26A7 82E7 2529  9BF0 5D8E 8BE9 F238 1AD4

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