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SubjectRe: [PATCH v1 1/1] mm/vmalloc.c: Fix percpu free VM area search criteria
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On 7/30/19 3:34 PM, Uladzislau Rezki wrote:
> Hello, Sathyanarayanan.
>
>> I agree with Dave. I don't think this issue is related to NUMA. The problem
>> here is about the logic we use to find appropriate vm_area that satisfies
>> the offset and size requirements of pcpu memory allocator.
>>
>> In my test case, I can reproduce this issue if we make request with offset
>> (ffff000000) and size (600000).
>>
> Just to clarify, does it mean that on your setup you have only one area with the
> 600000 size and 0xffff000000 offset?
No, its 2 areas. with offset (0, ffff000000) and size (a00000, 600000).
>
> Thank you.
>
> --
> Vlad Rezki
>
--
Sathyanarayanan Kuppuswamy
Linux kernel developer

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