From owner-freebsd-stable  Sun Apr 22 23:46:40 2001
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Date: Mon, 23 Apr 2001 01:45:51 -0500
From: Andrew Hesford <ajh3@chmod.ath.cx>
To: David Petrou <dpetrou@cs.cmu.edu>
Cc: freebsd-stable@freebsd.org
Subject: Re: shared mem default limits
Message-ID: <20010423014551.A94798@cec.wustl.edu>
References: <20010423022135.A48878@amant.pdl.cs.cmu.edu>
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In-Reply-To: <20010423022135.A48878@amant.pdl.cs.cmu.edu>; from dpetrou@cs.cmu.edu on Mon, Apr 23, 2001 at 02:21:35AM -0400
X-Loop: Andrew Hesford
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On Mon, Apr 23, 2001 at 02:21:35AM -0400, David Petrou wrote:
> Hi.  I used to get a lot of errors concerning shared memory segments
> not being available.  After doing some googling, I found the magic
> answer to my gnome woes.  It turns out that running Enlightenment,
> gnome, and lots of windows quickly exhausts the default kernel limits
> on some shared mem parameters.
> 
> This problem was discussed in -current in June 2000.
> 
> After throwing in:
> 
> options  SHMMAXPGS=8192
> options  SHMMNI=4096
> options  SHMSEG=1024
> 
> my problems went away.  (Problems would manifest themselves as windows
> disappearing when starting new apps, etc.)
> 
> Perhaps we could up the defaults?  Is there a compelling reason on
> today's machines to keep them small?
> 
> david

Is that the solution? I've been having a similar problem. In an attempt
to solve the problem, I tried deleting shared memory segments, and I got
this error with certain values:

	% ipcrm -m 65543
	ipcrm: shmid(65543): : Invalid argument

I know the segment exists, I can see it in ipcs. Also, I own it. How can
I forcefully delete those segments which just don't die?

-- 
Andrew Hesford
ajh3@chmod.ath.cx

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