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Date:      Sun, 19 Feb 2017 11:08:45 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 216606] kernel crashes early in pmap_map when pxe booted with rootfs in memory
Message-ID:  <bug-216606-8-J64UkTZbl4@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-216606-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-216606-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216606

longwitz@incore.de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |longwitz@incore.de

--- Comment #1 from longwitz@incore.de ---
The problem was caused by the size of my kernel and mfsroot. In my case I n=
eed
at boot 68 MB of physical memory (17 page table pages). The kernel needs 18
page table pages for the vm_page_array (/sys/i386/include/pmap.h). Therefore
the default for NKPT=3D30 is too low. After raising this to NKPT=3D36 in th=
e kernel
source the crash has gone.

This PR can be closed.

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