is it possible to set the following IPC options at boot instead of hard-coding them in kernel

[Matthew Seaman]

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Angelin Lalev wrote:
> Hi list, 
> 
> I'm running squid diskd on my proxy machines and I want to be able to use freebsd-update.
> Squid diskd requires the following options set in the kernel (example from daemon news 
> http://ezine.daemonnews.org/200209/squid.html)
> 
> 	options         SYSVMSG
> 
> 	options         MSGMNB=8192     # max # of bytes in a queue
> 	options         MSGMNI=40       # number of message queue identifiers
> 	options         MSGSEG=512      # number of message segments per queue
> 	options         MSGSSZ=64       # size of a message segment
> 	options         MSGTQL=2048     # max messages in system
> 
> I guess that updating that custom kernel will be a problem for freebsd-update, so is that 
> possible to set those values at boot? (I believe SYSVMSG is in GENERIC by default).

You should be able to set these via /boot/loader.conf which will let you
just use a GENERIC kernel.  Run:

   sysctl kern.ipc

to find the OID names and then just put eg:

   kern.ipc.msgmnb=8192

into loader.conf (plus all the other tunables you want to change) and
reboot.  For the gory details, look at /usr/src/sys/kern/sysv_msg.c --- I
can't find any actual documentation mentioning these OIDs but my reading
of the code suggests that is how it is meant to work.

	Cheers,

	Matthew


- -- 
Dr Matthew J Seaman MA, D.Phil.                       7 Priory Courtyard
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