Hello Dexuan,

This issue reproduced at least for 4 different HW platform:

Supermicro 6037R-TXRF
Supermicro A1SRM-2758F
Supermicro X9SCM-F
Gigabyte GA-C1037UN-EU

How can I help you resolve this issue ?

Thank you! 

The same result for r314862:

>> FreeBSD EFI boot block
  Loader path: /boot/loader.efi

  Initializing modules: ZFS UFS
  Probing 16 block devices..............*.+.. done
   ZFS found the following pools: zroot
   UFS found no partitions
Consoles: EFI console  
Staging area's size is reduced: 16384 -> 64!
Command line arguments: loader.efi
Image base: 0x6dc65000
EFI version: 2.31
EFI Firmware: American Megatrends (rev 5.08)

FreeBSD/amd64 EFI loader, Revision 1.1
EFI boot environment
Loading /boot/defaults/loader.conf
/boot/kernel/kernel text=0x9210f8 
elf64_loadimage: read failed
can't load file '/boot/kernel/kernel': input/output error
can't load file '/boot/kernel/kernel': input/output error

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel] in 2 seconds... 

Type '?' for a list of commands, 'help' for more detailed help.
OK  
OK  memmap
                  Type     Physical      Virtual   #Pages Attr
      BootServicesCode 000000000000 000000000000 00000008 UC WC WT WB 
    ConventionalMemory 000000008000 000000000000 00000027 UC WC WT WB 
      BootServicesData 00000002f000 000000000000 00000011 UC WC WT WB 
      BootServicesCode 000000040000 000000000000 00000060 UC WC WT WB 
    ConventionalMemory 000000100000 000000000000 00000100 UC WC WT WB 
      BootServicesData 000000200000 000000000000 00000040 UC WC WT WB 
    ConventionalMemory 000000240000 000000000000 0003fd80 UC WC WT WB 
            LoaderData 00003ffc0000 000000000000 00000040 UC WC WT WB 
    ConventionalMemory 000040000000 000000000000 00029c65 UC WC WT WB 
            LoaderData 000069c65000 000000000000 00004000 UC WC WT WB 
            LoaderCode 00006dc65000 000000000000 00000071 UC WC WT WB 
            LoaderData 00006dcd6000 000000000000 00002171 UC WC WT WB 
            LoaderCode 00006fe47000 000000000000 0000001d UC WC WT WB 
        MemoryMappedIO 00006fe64000 000000000000 00000014 UC WC WT WB 
      BootServicesData 00006fe78000 000000000000 0000ec32 UC WC WT WB 
    ConventionalMemory 00007eaaa000 000000000000 0000037b UC WC WT WB 
      BootServicesCode 00007ee25000 000000000000 00000285 UC WC WT WB 
              Reserved 00007f0aa000 000000000000 00000075 UC WC WT WB 
    ConventionalMemory 00007f11f000 000000000000 000000ae UC WC WT WB 
         ACPIMemoryNVS 00007f1cd000 000000000000 0000027b UC WC WT WB 
   RuntimeServicesData 00007f448000 000000000000 000001a7 UC WC WT WB 
   RuntimeServicesCode 00007f5ef000 000000000000 0000005c UC WC WT WB 
      BootServicesData 00007f64b000 000000000000 000001b5 UC WC WT WB 
    ConventionalMemory 000100000000 000000000000 00780000 UC WC WT WB 
        MemoryMappedIO 0000e0000000 000000000000 00004000 UC 
        MemoryMappedIO 0000fed01000 000000000000 00000003 UC 
        MemoryMappedIO 0000fed08000 000000000000 00000001 UC 
        MemoryMappedIO 0000fed0c000 000000000000 00000004 UC 
        MemoryMappedIO 0000fed1c000 000000000000 00000001 UC 
        MemoryMappedIO 0000fef00000 000000000000 00001100 UC 
OK 


Thank you!


Alex Deiter
alex.dei...@gmail.com



> On 7 Mar 2017, at 06:45, Dexuan Cui <de...@microsoft.com> wrote:
> 
>> From: Dexuan Cui
>> Sent: Tuesday, March 7, 2017 11:18
>> To: 'Alex Deiter' <alex.dei...@gmail.com>
>> Cc: Chris H <bsd-li...@bsdforge.com>; AN <a...@neu.net>; Ngie Cooper
>> (yaneurabeya) <yaneurab...@gmail.com>; Michael Tuexen
>> <tue...@freebsd.org>; Roberto Rodriguez Jr <rob.rodz....@gmail.com>; Guido
>> Falsi <m...@madpilot.net>; Warner Losh <i...@bsdimp.com>; Ultima
>> <ultima1...@gmail.com>; Sepherosa Ziehau <se...@freebsd.org>
>> Subject: RE: Boot failure - svn up from this morning
>> 
>>> From: Alex Deiter [mailto:alex.dei...@gmail.com]
>>> Sent: Tuesday, March 7, 2017 11:04
>>> To: Dexuan Cui <de...@microsoft.com>
>> 
>> 
>> Hi Alex,
>> Thanks very much for the quick reply!
>> 
>> I found an off-by-one bug in my patch and here is the fix.
>> I'll commit it shortly.
> 
> Hi Alex,
> I committed Revision 314828 for this:
> https://svnweb.freebsd.org/base?view=revision&revision=314828
> 
> I believe it should fix the issue for you now. :-)
> 
> Thanks,
> -- Dexuan

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