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Date:      Sat, 31 Aug 2002 20:11:46 -0300 (ADT)
From:      "Marc G. Fournier" <scrappy@hub.org>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        Arnvid Karstad <arnvid@karstad.org>, <bmah@FreeBSD.ORG>, <freebsd-stable@FreeBSD.ORG>
Subject:   Re: Problems with FreeBSD - causing zalloc to return 0 ?!
Message-ID:  <20020831200929.C14642-100000@mail1.hub.org>
In-Reply-To: <200208312003.g7VK37aS002117@apollo.backplane.com>

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On Sat, 31 Aug 2002, Matthew Dillon wrote:

>     Try this.  You can run gdb on a running machine as follows:
>
> 	gdb -k kernel.debug /dev/mem
>
>     You can then print out elements of the kernel's memory in real time:
>
>     gdb> print kernel_vm_end

'K, just did a cvsup and am rebuilding my kernel(s) to enable debugging
symbols, and will working on getting this setup this evening ...

>     Could you post your kernel config?  And repeat your test but run gdb
>     in a shell and print kernel_vm_end at the start of your test and
>     every so often while the test is running.

kernel config was sent in a seperate email ...

>     If you only have one swap device you can reducing the number of swap
>     devices by setting the NSWAPDEV kernel config variable to 1
>     (it defaults to 4).  This will reduce the KVM reservation for

have implemented this one ...

>     the swap bitmap.  You can also reduce the kernel reservation for
>     swap block data by setting the kern.maxswzone boot environment
>     variable.  This is in bytes, e.g. in /boot/loader.conf
>
>     kern.maxswzone="32m"

What exactly does this one mean?  Or do?  Will set it, but am curious ...



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