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SubjectRe: [RFC PATCH V5] mm readahead: Fix readahead fail for no local memory and limit readahead pages
On 02/13/2014 01:35 PM, David Rientjes wrote:
> On Thu, 13 Feb 2014, Raghavendra K T wrote:
>> I was able to test (1) implementation on the system where readahead problem
>> occurred. Unfortunately it did not help.
>> Reason seem to be that CONFIG_HAVE_MEMORYLESS_NODES dependency of
>> numa_mem_id(). The PPC machine I am facing problem has topology like
>> this:
>> So it seems numa_mem_id() does not help for all the configs..
>> Am I missing something ?
> You need the patch from
> first.

Thanks David, unfortunately even after applying that patch, I do not see
the improvement.

Interestingly numa_mem_id() seem to still return the value of a
memoryless node.
May be per cpu _numa_mem_ values are not set properly. Need to dig out ....

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