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Date:      Thu, 21 Nov 2002 09:05:13 +0200
From:      "Petri Helenius" <pete@he.iki.fi>
To:        "David Schultz" <dschultz@uclink.Berkeley.EDU>
Cc:        <freebsd-questions@FreeBSD.ORG>, <freebsd-net@FreeBSD.ORG>
Subject:   Re: panic: kmem_map too small
Message-ID:  <126801c2912c$5be3cec0$862a40c1@PHE>
References:  <0e3b01c28fc4$ff9a4ee0$862a40c1@PHE> <20021119152114.GA2228@HAL9000.homeunix.com> <3DDBDE2B.6050407@he.iki.fi> <20021120195919.GA679@HAL9000.homeunix.com> <11fd01c290eb$f48311e0$862a40c1@PHE> <20021121022524.GA2300@HAL9000.homeunix.com>

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> > With about 150M in use and KVA_PAGES undefined in config (default),
> > both 4.7-STABLE and 5.0-CURRENT panic (1G installed memory).
>
> Yes, the default is 256, IIRC.  That corresponds to 1 GB of KVA,
> and you have only 1 GB of physical memory to back it.  I take it
> this is a very busy machine.  Short of getting more memory, you
> can decrease memory utilization by the network, e.g. by decreasing
> TCP window sizes, or you can limit memory usage by the network so
> you don't get panics.  I forget the details here, so perhaps
> someone else can fill them in.
>
The thing I´m concerned about that if with 150M kernel memory usage and
>200M free and >300M inact memory the system panics, how much "extra"
memory is needed to keep it running? And the swap is never touched.

Pete


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