Messages in this thread | | | Date | Mon, 10 Jun 2013 11:28:15 -0700 | Subject | Re: 3.10-rc4: mtrr_cleanup: can not find optimal value, please specify mtrr_gran_size/mtrr_chunk_size | From | Yinghai Lu <> |
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On Mon, Jun 10, 2013 at 11:00 AM, Sergey Meirovich <rathamahata@gmail.com> wrote:
> 3.10-rc5 with patches has curred error messages in dmesg but MTRRs > still do not cover my entire memory (7748Mb) or anything close to it > ("total RAM covered: 2936M").Unfortunately, I don't have anything > other to compare to because this system started straight with 3.9.X
Your system is AMD 64bit, so there is TOM2.
> > rathamahata@piledriver ~ $ free -m > total used free shared buffers cached > Mem: 7748 1264 6483 0 56 513 > -/+ buffers/cache: 695 7053 > Swap: 3659 0 3659 > rathamahata@piledriver ~ $ > > ... > [ 0.000000] e820: last_pfn = 0x23f000 max_arch_pfn = 0x400000000 > [ 0.000000] MTRR default type: uncachable > [ 0.000000] MTRR fixed ranges enabled: > [ 0.000000] 00000-9FFFF write-back > [ 0.000000] A0000-BFFFF write-through > [ 0.000000] C0000-D2FFF write-protect > [ 0.000000] D3000-DFFFF uncachable > [ 0.000000] E0000-FFFFF write-protect > [ 0.000000] MTRR variable ranges enabled: > [ 0.000000] 0 base 000000000000 mask FFFF80000000 write-back > [ 0.000000] 1 base 000080000000 mask FFFFC0000000 write-back > [ 0.000000] 2 base 0000B7800000 mask FFFFFF800000 uncachable > [ 0.000000] 3 base 0000B8000000 mask FFFFF8000000 uncachable > [ 0.000000] 4 disabled > [ 0.000000] 5 disabled > [ 0.000000] 6 disabled > [ 0.000000] 7 disabled > [ 0.000000] TOM2: 000000023f000000 aka 9200M > [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 > [ 0.000000] original variable MTRRs > [ 0.000000] reg 0, base: 0GB, range: 2GB, type WB > [ 0.000000] reg 1, base: 2GB, range: 1GB, type WB > [ 0.000000] reg 2, base: 2936MB, range: 8MB, type UC > [ 0.000000] reg 3, base: 2944MB, range: 128MB, type UC > [ 0.000000] total RAM covered: 2936M > [ 0.000000] Found optimal setting for mtrr clean up > [ 0.000000] gran_size: 64K chunk_size: 256M num_reg: 4 > lose cover RAM: 0G > [ 0.000000] New variable MTRRs > [ 0.000000] reg 0, base: 0GB, range: 2GB, type WB > [ 0.000000] reg 1, base: 2GB, range: 1GB, type WB > [ 0.000000] reg 2, base: 2936MB, range: 8MB, type UC > [ 0.000000] reg 3, base: 2944MB, range: 128MB, type UC > [ 0.000000] e820: update [mem 0xb7800000-0xffffffff] usable ==> reserved > [ 0.000000] e820: last_pfn = 0xb7800 max_arch_pfn = 0x400000000 > [ 0.000000] Base memory trampoline at [ffff880000099000] 99000 size 24576 > [ 0.000000] Using GB pages for direct mapping > [ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]20: > last_pfn = 0x23f000 max_arch_pfn = 0x400000000 > [ 0.000000] MTRR default type: uncachable > [ 0.000000] MTRR fixed ranges enabled: > [ 0.000000] 00000-9FFFF write-back > [ 0.000000] A0000-BFFFF write-through > [ 0.000000] C0000-D2FFF write-protect > [ 0.000000] D3000-DFFFF uncachable > [ 0.000000] E0000-FFFFF write-protect > [ 0.000000] MTRR variable ranges enabled: > [ 0.000000] 0 base 000000000000 mask FFFF80000000 write-back > [ 0.000000] 1 base 000080000000 mask FFFFC0000000 write-back > [ 0.000000] 2 base 0000B7800000 mask FFFFFF800000 uncachable > [ 0.000000] 3 base 0000B8000000 mask FFFFF8000000 uncachable > [ 0.000000] 4 disabled > [ 0.000000] 5 disabled > [ 0.000000] 6 disabled > [ 0.000000] 7 disabled > [ 0.000000] TOM2: 000000023f000000 aka 9200M
[4G, 9200M) is write-back automatically, there is no need to cover them again with VAR mtrr.
> [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 > [ 0.000000] original variable MTRRs > [ 0.000000] reg 0, base: 0GB, range: 2GB, type WB > [ 0.000000] reg 1, base: 2GB, range: 1GB, type WB > [ 0.000000] reg 2, base: 2936MB, range: 8MB, type UC > [ 0.000000] reg 3, base: 2944MB, range: 128MB, type UC > [ 0.000000] total RAM covered: 2936M
It only count var really.
> [ 0.000000] Found optimal setting for mtrr clean up > [ 0.000000] gran_size: 64K chunk_size: 256M num_reg: 4 > lose cover RAM: 0G > [ 0.000000] New variable MTRRs > [ 0.000000] reg 0, base: 0GB, range: 2GB, type WB > [ 0.000000] reg 1, base: 2GB, range: 1GB, type WB > [ 0.000000] reg 2, base: 2936MB, range: 8MB, type UC > [ 0.000000] reg 3, base: 2944MB, range: 128MB, type UC > [ 0.000000] e820: update [mem 0xb7800000-0xffffffff] usable ==> reserved > [ 0.000000] e820: last_pfn = 0xb7800 max_arch_pfn = 0x400000000 > [ 0.000000] Base memory trampoline at [ffff880000099000] 99000 size 24576 > [ 0.000000] Using GB pages for direct mapping > [ 0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff] > ...
so there is no problem with your system...
Thanks
Yinghai
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