RE: [Xen-ia64-devel] [PATCH] Fix acpi_parse_lsapic for host SMP

["Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>]

Committed. 

> -----Original Message-----
> From: xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-ia64-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf 
> Of Masaki Kanno
> Sent: Monday, December 19, 2005 11:46 PM
> To: xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-ia64-devel] [PATCH] Fix acpi_parse_lsapic for host SMP
> 
> Hi,
> 
> This patch is intended to correct the number of CPUs.
> 
> Our IPF machines are the following configurations.
>  - Total logical cpus = 16
>   -- 4 sockets
>   -- 2 cores
>   -- 2 threads
> 
> I changed the setting of BIOS, and invalidated the 
> hyperthread, and I built Xen with NR_CPUS=8.
> As a result, it became like attached file xendmesg1.txt.
>  - Available cpus 3
>  - Total cpus 8
> 
> Next, I built Xen with NR_CPUS=16.
> As a result, it became like attached file xendmesg2.txt.
>  - Available cpus 8
>  - Total cpus 16
> 
> I thought not to match the analysis of the lsapic entry to 
> the value of NR_CPUS. 
> 
> It is an outline of patch as follows.
>  1. Count up the lsapic entry by using 
> acpi_table_count_madt()/acpi_table_count_madt_family().
>  2. Call acpi_parse_lsapic() by using the number of lsapic entries.
>  3. Count up the available_cpus by using acpi_parse_lsapic(), 
> however NR_CPUS is not exceeded.
> 
> Signed-off-by: Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>
> 
> Best Regards,
>  Kan
> 
> 

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