how many memory is needed for FreeBSD 9 ?

illoai at illoai at
Mon Oct 22 00:04:37 UTC 2012

On 21 October 2012 12:49, andrew clarke <mail at> wrote:
> On Sun 2012-10-21 18:21:59 UTC+0200, Patrick Lamaiziere (patfbsd at wrote:
>> I'm updating an old laptop running FreeBSD 8.1 with 64 MB ram (44MB
>> available) but now FreeBSD 9.1 panics at boot time:
>> panic: kmem_malloc(4194304): kmem_map too small: 24584192 allocated?
> That's one very old laptop. I think you'll need to install more memory
> or downgrade FreeBSD to an earlier version.
> 9.1-RELEASE isn't available yet, only 9.1-RC1 & RC2. Given it's
> prerelease code it's plausible the 9.1-RC2 kernel requires more memory
> at boot than 9.1-REL will. Attempting to boot 9.0-REL from CD on your
> laptop should answer that question.
> From my limited testing under VirtualBox, 96 MB RAM is about the lower
> limit that will allow FreeBSD 9.1-RC2 to boot before the swap
> partition is enabled. Any less and the kernel will freeze or panic at
> boot. This was with the amd64 version though, not i386.

Keep in mind that the installer will take some memory
on top of what is needed to boot FreeBSD.


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