From: Mike Travis <travis@sgi.com>
Date: Sun, 11 Jan 2009 05:58:10 +0000 (-0800)
Subject: SGI UV cpumask: use static temp cpumask in flush_tlb
X-Git-Tag: v2.6.30-rc1~3^2~6^2~39
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e21990ae7ee11af94f44f240b06e520cf1505d4;p=pandora-kernel.git

SGI UV cpumask: use static temp cpumask in flush_tlb

Impact: Improve tlb flush performance for UV

Calling alloc_cpumask_var a zillion times a second does affect
performance.  Replace with static cpumask.

Note: when CONFIG_X86_UV is defined, this extra PER_CPU memory
will be optimized out for non-UV configs as is_uv_system() will
then return a constant 0.

Signed-off-by: Mike Travis <travis@sgi.com>
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