There was a large performance regression that was bisected to commit 611ae8e3
(x86/tlb: enable tlb flush range support for x86). This patch simply changes
the default balance point between a local and global flush for IvyBridge.
In the interest of allowing the tests to be reproduced, this patch was
tested using mmtests 0.15 with the following configurations
configs/config-global-dhp__tlbflush-performance
configs/config-global-dhp__scheduler-performance
configs/config-global-dhp__network-performance
Based on these results, changing the default for Ivybridge seems
like a logical choice.
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Reviewed-by: Alex Shi <alex.shi@xxxxxxxxxx>