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Re: [Qemu-devel] [PATCH V17 02/11] NUMA: check if the total numa memory
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From: |
Paolo Bonzini |
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Subject: |
Re: [Qemu-devel] [PATCH V17 02/11] NUMA: check if the total numa memory size is equal to ram_size |
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Date: |
Tue, 10 Dec 2013 19:03:50 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
Il 10/12/2013 14:15, Eduardo Habkost ha scritto:
>> > If the total number of the assigned numa nodes memory is not
>> > equal to the assigned ram size, it will write the wrong data
>> > to ACPI talb, then the guest will ignore the wrong ACPI table
>> > and recognize all memory to one node. It's buggy, we should
>> > check it to ensure that we write the right data to ACPI table.
>> >
>> > Signed-off-by: Wanlong Gao <address@hidden>
> This will make configurations that could be running for years (except
> that the guest OS was ignoring the NUMA data) suddenly stop running. I
> just want to confirm: we really want that, right?
>
> Does libvirt allow this kind of broken configuration to be generated, or
> it already ensures the total NUMA node sizes match RAM size?
It allows this. It just converts the <numa> XML to "-numa node".
Paolo
[Qemu-devel] [PATCH V17 01/11] NUMA: move numa related code to new file numa.c, Wanlong Gao, 2013/12/04
[Qemu-devel] [PATCH V17 06/11] NUMA: add "-numa mem," options, Wanlong Gao, 2013/12/04
[Qemu-devel] [PATCH V17 04/11] NUMA: convert -numa option to use OptsVisitor, Wanlong Gao, 2013/12/04
[Qemu-devel] [PATCH V17 03/11] NUMA: Add numa_info structure to contain numa nodes info, Wanlong Gao, 2013/12/04
[Qemu-devel] [PATCH V17 08/11] NUMA: parse guest numa nodes memory policy, Wanlong Gao, 2013/12/04
[Qemu-devel] [PATCH V17 05/11] NUMA: introduce NumaMemOptions, Wanlong Gao, 2013/12/04
[Qemu-devel] [PATCH V17 07/11] NUMA: expand MAX_NODES from 64 to 128, Wanlong Gao, 2013/12/04