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Date: Tue, 29 Oct 2013 17:36:43 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: J David <j.david.lists@gmail.com>,
 "freebsd-fs@freebsd.org" <freebsd-fs@FreeBSD.org>
Subject: Re: 9.2 + ZFS + i386 = panic: pmap_enter: attempted pmap_enter on
 4MB page
References: <CABXB=RQd_yT+sEA0qBnyCK-3ZsvxfSiSCcMVjnHoSyCB+Z5+Rg@mail.gmail.com>
 <CABXB=RTtenabJ=V+yhB622-HkBYi+ZE3-MTDg-dqMV+HxWb4UQ@mail.gmail.com>
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on 29/10/2013 15:48 J David said the following:
> On Tue, Oct 15, 2013 at 11:17 AM, J David <j.david.lists@gmail.com> wrote:
>> This machine was rock solid under 8.4, but since upgrading to 9.2 it
>> has been a disaster.  It crashes every few hours with "panic:
>> pmap_enter: attempted pmap_enter on 4MB page."
> 
> In the absence of a fix, the best workaround we have found for this
> issue has been to set vm.pmap.pg_ps_enabled=0 in /boot/loader.conf.
> 

And with that you are not getting any panic any more?
What CPU do you have? Relevant lines from the beginning of dmesg will do.

-- 
Andriy Gapon