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Date:      Sat, 17 Jun 2006 23:52:02 +0400 (MSD)
From:      Maxim Konovalov <maxim@macomnet.ru>
To:        "Marc G. Fournier" <scrappy@hub.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: 6.1:  kern.ipc.maxpipekva
Message-ID:  <20060617234931.W41802@mp2.macomnet.net>
In-Reply-To: <20060617164334.K1114@ganymede.hub.org>
References:  <20060617164334.K1114@ganymede.hub.org>

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On Sat, 17 Jun 2006, 16:44-0300, Marc G. Fournier wrote:

>
> Jun 17 16:00:03 pluto kernel: kern.ipc.maxpipekva exceeded; see tuning(7)
> Jun 17 16:00:04 pluto kernel: kern.ipc.maxpipekva exceeded; see tuning(7)

I thought about removing this reference but then decided that better
to add a couple of words to tuning(7) man page (and didn't add).

> but I can't seem to find anything in tuning(7) about it ... so, what
> is it and how do I monitor for it?

kern/sys_pipe.c:

 * In order to limit the resource use of pipes, two sysctls exist:
 *
 * kern.ipc.maxpipekva - This is a hard limit on the amount of pageable
 * address space available to us in pipe_map. This value is normally
 * autotuned, but may also be loader tuned.
 *
 * kern.ipc.pipekva - This read-only sysctl tracks the current amount of
 * memory in use by pipes.

-- 
Maxim Konovalov



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