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Date:      Wed, 14 Dec 2016 21:03:49 +0200
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        freebsd-current@freebsd.org
Subject:   Re: Enabling NUMA in BIOS stop booting FreeBSD
Message-ID:  <20161214190349.GJ94325@kib.kiev.ua>
In-Reply-To: <20161214152627.GF98176@zxy.spb.ru>
References:  <20161213150139.GZ54029@kib.kiev.ua> <20161213152838.GL90287@zxy.spb.ru> <20161213172529.GC54029@kib.kiev.ua> <20161213174345.GB98176@zxy.spb.ru> <20161214095350.GE94325@kib.kiev.ua> <20161214102711.GF94325@kib.kiev.ua> <20161214105211.GC98176@zxy.spb.ru> <20161214113927.GG94325@kib.kiev.ua> <20161214121336.GD98176@zxy.spb.ru> <20161214152627.GF98176@zxy.spb.ru>

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On Wed, Dec 14, 2016 at 06:26:27PM +0300, Slawa Olhovchenkov wrote:
> On Wed, Dec 14, 2016 at 03:13:36PM +0300, Slawa Olhovchenkov wrote:
> 
> > On Wed, Dec 14, 2016 at 01:39:27PM +0200, Konstantin Belousov wrote:
> > 
> > > In other words, it is almost certainly the hang and not a fault causing
> > > hang. This means that the machine is not compliant with the IA32
> > > architecture, in particular, the region reported as normal memory by
> > > E820 BIOS service does not behave as normal memory.
> > > 
> > > Since regardless of the option setting, the memory map is same, and
> > > bootstrap page table only depend on the memory map, we use the same page
> > > table when hanging and when operating correctly. We do not fault or hang
> > > when the option is turned off, which together with the improved early
> > > fault handling in the patch, makes it almost certain that the problem is
> > > in hardware configuration and not in our early setup.
> > > 
> > > Of course, the most puzzling part is that memory test makes the hang
> > > go away, while repeating memory test operation only on the msgbuf region
> > > does not. msgbuf is special in that it is located at TOHM (top of high
> > > memory). It spans 128KB from below it to the last byte of the last
> > > physical segment.
> > > 
> > > The only ideas I have right now is that there is either a bug in the
> > > Caching Agent/Home agent/IMC configuration in BIOS, in which case there
> > > is nothing OS can do to mitigate it.  Or it might be that the memory
> > > map reported by CMS is wrong (you said that you use legacy boot, right
> > > ?).  This is not too surprising if true, because non-EFI boot code path
> > > definitely get less and less testing.
> > > 
> > > For the later case (potential bug in CMS), could you switch to EFI boot
> > > mode and see whether the issue magically healths itself ?  You could boot
> > > from USB stick in EFI mode without reinstalling for test.
> > 
> > I can't boot from USB stick -- this is remote DC and IPMI allow only
> > CDROM emulation.
> > 
> > OK, I am boot in UEFI 12.0 snapshot ISO.
> > Boot ok.
> 
> Sorry. Overload bu work and test wrong combination (NUMA=ON,
> interleave=OFF)
> 
> snapshot iso don't boot with NUMA=ON interleave=ON
Ok.

> 
> For test hardware setup (NUMA+interleave), what ISO I can try to boot?
Didn't you already tried ?

> 
> PS: memmaps:
> 
> NUMA=ON interleave=OFF
> 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 000660a3 UC WC WT WB
>        BootServicesData 0000661a3000 000000000000 00000080 UC WC WT WB
>      ConventionalMemory 000066223000 000000000000 000076b8 UC WC WT WB
>              LoaderData 00006d8db000 000000000000 00008000 UC WC WT WB
>              LoaderCode 0000758db000 000000000000 00000070 UC WC WT WB
>        BootServicesData 00007594b000 000000000000 00003220 UC WC WT WB
>      ConventionalMemory 000078b6b000 000000000000 0000028e UC WC WT WB
>        BootServicesCode 000078df9000 000000000000 00000372 UC WC WT WB
>                Reserved 00007916b000 000000000000 00000817 UC WC WT WB
>      ConventionalMemory 000079982000 000000000000 0000011f UC WC WT WB
>           ACPIMemoryNVS 000079aa1000 000000000000 00000509 UC WC WT WB
>     RuntimeServicesData 000079faa000 000000000000 00001dbd UC WC WT WB
>     RuntimeServicesCode 00007bd67000 000000000000 00000061 UC WC WT WB
>        BootServicesData 00007bdc8000 000000000000 00000001 UC WC WT WB
>     RuntimeServicesData 00007bdc9000 000000000000 00000086 UC WC WT WB
>        BootServicesData 00007be4f000 000000000000 000001b1 UC WC WT WB
>      ConventionalMemory 000100000000 000000000000 01f80000 UC WC WT WB
>                Reserved 00007c000000 000000000000 00004000
>          MemoryMappedIO 000080000000 000000000000 00010000 UC
>          MemoryMappedIO 0000fed1c000 000000000000 00000029 UC
>          MemoryMappedIO 0000ff000000 000000000000 00001000 UC
> 
> NUMA=ON interleave=ON
>                    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 000660a3 UC WC WT WB
>        BootServicesData 0000661a3000 000000000000 00000080 UC WC WT WB
>      ConventionalMemory 000066223000 000000000000 000076b8 UC WC WT WB
>              LoaderData 00006d8db000 000000000000 00008000 UC WC WT WB
>              LoaderCode 0000758db000 000000000000 00000070 UC WC WT WB
>        BootServicesData 00007594b000 000000000000 00003220 UC WC WT WB
>      ConventionalMemory 000078b6b000 000000000000 0000028e UC WC WT WB
>        BootServicesCode 000078df9000 000000000000 00000372 UC WC WT WB
>                Reserved 00007916b000 000000000000 00000817 UC WC WT WB
>      ConventionalMemory 000079982000 000000000000 0000011f UC WC WT WB
>           ACPIMemoryNVS 000079aa1000 000000000000 00000509 UC WC WT WB
>     RuntimeServicesData 000079faa000 000000000000 00001dbd UC WC WT WB
>     RuntimeServicesCode 00007bd67000 000000000000 00000061 UC WC WT WB
>        BootServicesData 00007bdc8000 000000000000 00000001 UC WC WT WB
>     RuntimeServicesData 00007bdc9000 000000000000 00000086 UC WC WT WB
>        BootServicesData 00007be4f000 000000000000 000001b1 UC WC WT WB
>      ConventionalMemory 000100000000 000000000000 01f80000 UC WC WT WB
>                Reserved 00007c000000 000000000000 00004000
>          MemoryMappedIO 000080000000 000000000000 00010000 UC
>          MemoryMappedIO 0000fed1c000 000000000000 00000029 UC
>          MemoryMappedIO 0000ff000000 000000000000 00001000 UC
So my opinion did not changed, this sounds like firmware problem.
I do not see how can I drill into it more.

> 
> NUMA=OFF interleave=ON
>                    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 000660a3 UC WC WT WB
>        BootServicesData 0000661a3000 000000000000 00000080 UC WC WT WB
>      ConventionalMemory 000066223000 000000000000 000076b8 UC WC WT WB
>              LoaderData 00006d8db000 000000000000 00008000 UC WC WT WB
>              LoaderCode 0000758db000 000000000000 00000070 UC WC WT WB
>        BootServicesData 00007594b000 000000000000 00003220 UC WC WT WB
>      ConventionalMemory 000078b6b000 000000000000 0000028e UC WC WT WB
>        BootServicesCode 000078df9000 000000000000 00000372 UC WC WT WB
>                Reserved 00007916b000 000000000000 00000817 UC WC WT WB
>      ConventionalMemory 000079982000 000000000000 00000123 UC WC WT WB
>           ACPIMemoryNVS 000079aa5000 000000000000 00000505 UC WC WT WB
>     RuntimeServicesData 000079faa000 000000000000 00001dbd UC WC WT WB
>     RuntimeServicesCode 00007bd67000 000000000000 00000061 UC WC WT WB
>        BootServicesData 00007bdc8000 000000000000 00000001 UC WC WT WB
>     RuntimeServicesData 00007bdc9000 000000000000 00000086 UC WC WT WB
>        BootServicesData 00007be4f000 000000000000 000001b1 UC WC WT WB
>      ConventionalMemory 000100000000 000000000000 01f80000 UC WC WT WB
>                Reserved 00007c000000 000000000000 00004000
>          MemoryMappedIO 000080000000 000000000000 00010000 UC
>          MemoryMappedIO 0000fed1c000 000000000000 00000029 UC
>          MemoryMappedIO 0000ff000000 000000000000 00001000 UC



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