Re: [PATCH 4/5] x86: mm: Change tlb_flushall_shift for IvyBridge

[Rik van Riel]

On 01/09/2014 09:34 AM, Mel Gorman wrote:
> 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>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>
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