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 UCReceived on Wed Dec 14 2016 - 18:03:56 UTC
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