Commit 3ab0c49f authored Nov 02, 2014 by James Custer Committed by Thomas Gleixner Nov 03, 2014

x86: UV BAU: Increase maximum CPUs per socket/hub



We have encountered hardware with 18 cores/socket that gives 36 CPUs/socket
with hyperthreading enabled. This exceeds the current MAX_CPUS_PER_SOCKET
causing a failure in get_cpu_topology. Increase MAX_CPUS_PER_SOCKET to 64
and MAX_CPUS_PER_UVHUB to 128.

Signed-off-by: James Custer <jcuster@sgi.com>
Cc: Russ Anderson <rja@sgi.com>
Link: http://lkml.kernel.org/r/1414952199-185319-1-git-send-email-jcuster@sgi.com


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent fa2a79ce

arch/x86/include/asm/uv/uv_bau.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -33,8 +33,8 @@
		* Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
		*/

		#define MAX_CPUS_PER_UVHUB 64
		#define MAX_CPUS_PER_SOCKET 32
		#define MAX_CPUS_PER_UVHUB 128
		#define MAX_CPUS_PER_SOCKET 64
		#define ADP_SZ 64 /* hardware-provided max. */
		#define UV_CPUS_PER_AS 32 /* hardware-provided max. */
		#define ITEMS_PER_DESC 8

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