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

Michael Ellerman mpe at ellerman.id.au
Thu Aug 20 09:14:14 AEST 2015

On Thu, 2015-02-07 at 05:39:01 UTC, Nikunj A Dadhania wrote:
> 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 at linux.vnet.ibm.com>
> Signed-off-by: Nikunj A Dadhania <nikunj at linux.vnet.ibm.com>
> Acked-by: Anton Blanchard <anton at samba.org>

Applied to powerpc next, thanks.



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