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Date:   Thu, 21 Dec 2017 09:39:01 +0800
From:   kemi <>
To:     Christopher Lameter <>
Cc:     Michal Hocko <>,
        Greg Kroah-Hartman <>,
        Andrew Morton <>,
        Vlastimil Babka <>,
        Mel Gorman <>,
        Johannes Weiner <>,
        Andrey Ryabinin <>,
        Nikolay Borisov <>,
        Pavel Tatashin <>,
        David Rientjes <>,
        Sebastian Andrzej Siewior <>,
        Dave <>,
        Andi Kleen <>,
        Tim Chen <>,
        Jesper Dangaard Brouer <>,
        Ying Huang <>,
        Aaron Lu <>, Aubrey Li <>,
        Linux MM <>,
        Linux Kernel <>
Subject: Re: [PATCH v2 4/5] mm: use node_page_state_snapshot to avoid

On 2017年12月20日 23:58, Christopher Lameter wrote:
> On Wed, 20 Dec 2017, kemi wrote:
>>> You are making numastats special and I yet haven't heard any sounds
>>> arguments for that. But that should be discussed in the respective
>>> patch.
>> That is because we have much larger threshold size for NUMA counters, that means larger
>> deviation. So, the number in local cpus may not be simply ignored.
> Some numbers showing the effect of these changes would be helpful. You can
> probably create some in kernel synthetic tests to start with which would
> allow you to see any significant effects of those changes.
> Then run the larger testsuites (f.e. those that Mel has published) and
> benchmarks to figure out how behavior of real apps *may* change?

I will do that when available.
Let's just drop this patch in this series and consider this issue
in another patch. 

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