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Subject: [Bug 194793] EFI boot loader panic: vm_fault: fault no nofault
 entry,  addr:   fffffe0000eb8000   (10.1-rc4) efi boot only
Date: Tue, 20 Jan 2015 22:57:50 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194793

--- Comment #1 from North <nccs@vfemail.net> ---
update:

ONLY!! boots a custom slim down 10.1 prerelease kernel (unused network devices
removed) 

Used of  GENERIC kernel of 10.1 rc4, 10.1 prerelease, 10.1-release fail with
panic reboot.  

Downloaded new FreeBSD-10.1-RELEASE-amd64-uefi-memstick.img usb install image.

Boot from USB image fails with panic reboot (see below)


>> FreeBSD EFI boot block
   Loader path" /boot/loader.efi
Consoles: EFI console
Image base: 0x4b92900
EFI version: 2.31
EFI Firmare American Megatrends (rev 4.654)

FreeBSD/and64 EFI Loader, Revision 1.1
(root@releng1.nyi.freebsd.org, Tue Nov 11 20:57:24 UTC 2014)
Loading /boot/defaults/loader.conf
/boot/kernel/kernel text=0xf8f898 data=0x124a30+0x2055c0
syms=[0x8+0x1405e0+0x8+0x15b077]

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Start @ 0xffff??????????
(painic reboot)


YET!! boot from MBR on same USB seems to work fine!!

Noted Differences between UEFI and MBR bootloaders


Consoles :internal video/keyboard  (not EFI console)

/boot/kernel/kernel  text, data amd syms are the same.

may be related to Bug 193646
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193646

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