Re: [PATCH RESEND] powerpc/numa: initialize distance lookup table from drconf path

From: Nikunj A Dadhania
Date: Tue Aug 11 2015 - 05:56:23 EST

Hi Michael,

Nikunj A Dadhania <nikunj@xxxxxxxxxxxxxxxxxx> writes:
> In some situations, a NUMA guest that supports
> ibm,dynamic-memory-reconfiguration node will end up having flat NUMA
> distances between nodes. This is because of two problems in the
> current code.
> 1) Different representations of associativity lists.
> There is an assumption about the associativity list in
> initialize_distance_lookup_table(). Associativity list has two forms:
> a) [cpu,memory]@x/ibm,associativity has following
> format:
> <N> <N integers>
> b) ibm,dynamic-reconfiguration-memory/ibm,associativity-lookup-arrays
> <M> <N> <M associativity lists each having N integers>
> M = the number of associativity lists
> N = the number of entries per associativity list
> Fix initialize_distance_lookup_table() so that it does not assume
> "case a". And update the caller to skip the length field before
> sending the associativity list.
> 2) Distance table not getting updated from drconf path.
> Node distance table will not get initialized in certain cases as
> ibm,dynamic-reconfiguration-memory path does not initialize the
> lookup table.
> Call initialize_distance_lookup_table() from drconf path with
> appropriate associativity list.
> Reported-by: Bharata B Rao <bharata@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Nikunj A Dadhania <nikunj@xxxxxxxxxxxxxxxxxx>
> Acked-by: Anton Blanchard <anton@xxxxxxxxx>

Have you pulled this?


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