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Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7

From Christoph Lameter <cl@linux.com>
Newsgroups linux.kernel
Subject Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7
Date 2016-12-07 18:20 +0100
Message-ID <sLO2S-2Y5-29@gated-at.bofh.it> (permalink)
References <sLHup-7do-25@gated-at.bofh.it> <sLLRo-1pk-21@gated-at.bofh.it> <sLMNs-1Yv-19@gated-at.bofh.it> <sLNzP-2yE-3@gated-at.bofh.it> <sLNzQ-2yE-9@gated-at.bofh.it>
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On Wed, 7 Dec 2016, Mel Gorman wrote:

> 3.0-era kernels had better fragmentation control, higher success rates at
> allocation etc. I vaguely recall that it had fewer sources of high-order
> allocations but I don't remember specifics and part of that could be the
> lack of THP at the time. The overhead was massive due to massive stalls
> and excessive reclaim -- hours to complete some high-allocation stress
> tests even if the success rate was high.

There were a couple of high order page reclaim improvements implemented
at that time that were later abandoned. I think higher order pages were
more available than now. SLUB was regularly able to get higher order pages.

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Thread

[PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-07 11:20 +0100
  Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Christoph Lameter <cl@linux.com> - 2016-12-07 16:00 +0100
    Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-07 17:00 +0100
      Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Christoph Lameter <cl@linux.com> - 2016-12-07 17:50 +0100
        Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-07 17:50 +0100
          Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Christoph Lameter <cl@linux.com> - 2016-12-07 18:20 +0100
            Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-07 18:40 +0100
  Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Eric Dumazet <eric.dumazet@gmail.com> - 2016-12-07 20:10 +0100
    Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Eric Dumazet <eric.dumazet@gmail.com> - 2016-12-07 20:20 +0100
    Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-07 20:50 +0100
      Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Eric Dumazet <eric.dumazet@gmail.com> - 2016-12-07 21:20 +0100
        Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-07 22:30 +0100
          Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-08 00:30 +0100
            Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Jesper Dangaard Brouer <brouer@redhat.com> - 2016-12-08 09:30 +0100
              Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-08 10:20 +0100
                Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Jesper Dangaard Brouer <brouer@redhat.com> - 2016-12-08 11:50 +0100
                Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-08 12:10 +0100
                Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Jesper Dangaard Brouer <brouer@redhat.com> - 2016-12-08 15:50 +0100
                Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-08 16:20 +0100
                Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Jesper Dangaard Brouer <brouer@redhat.com> - 2016-12-08 18:30 +0100
                Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Mel Gorman <mgorman@techsingularity.net> - 2016-12-08 18:40 +0100
                Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 Eric Dumazet <eric.dumazet@gmail.com> - 2016-12-08 17:10 +0100

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