Messages in this thread |  | | Date | Thu, 13 Feb 2014 15:34:22 +0530 | From | Raghavendra K T <> | Subject | Re: [RFC PATCH V5] mm readahead: Fix readahead fail for no local memory and limit readahead pages |
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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 http://marc.info/?l=linux-mm&m=139093411119013 > 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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