Messages in this thread | | | From | Andrew Walrond <> | Subject | Re: lost memory on a 4GB amd64 | Date | Fri, 24 Sep 2004 13:15:42 +0100 |
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On Friday 24 Sep 2004 12:42, you wrote: > > NUMA was enabled all the time (at least most of the time). I don't know if > I ever ran it without NUMA. I'll certainly try that. > > Unfortunately, I won't be able to do any reboots during the next one or > two weeks since the machine has gone into stable operation tonight. (with > some loss of memory for now) > > if it is of some interest, that's what dmesg tells about NUMA: > > BIOS-provided physical RAM map: > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable) > BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved) > BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) > BIOS-e820: 0000000000100000 - 00000000bfff0000 (usable) > BIOS-e820: 00000000bfff0000 - 00000000bffff000 (ACPI data) > BIOS-e820: 00000000bffff000 - 00000000c0000000 (ACPI NVS) > BIOS-e820: 00000000ff780000 - 0000000100000000 (reserved) > BIOS-e820: 0000000100000000 - 0000000140000000 (usable) > Scanning NUMA topology in Northbridge 24 > Number of nodes 2 (10010) > Node 0 MemBase 0000000000000000 Limit 000000013fffffff > Skipping disabled node 1 > Using node hash shift of 24 > Bootmem setup node 0 0000000000000000-000000013fffffff > No mptable found. > On node 0 totalpages: 1310719 > DMA zone: 4096 pages, LIFO batch:1 > Normal zone: 1306623 pages, LIFO batch:16 > HighMem zone: 0 pages, LIFO batch:1 > > So actually it looks like the kernel well notices that only one processor > has access to the memory here. >
Intriguing. If it works with NUMA disabled, it would strongly indicate a bug in the NUMA kernel code.
Definately worth a try as soon as you can afford to take the machine down for a few minutes.
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