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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 16:00 +0100
Message-ID <sLLRo-1pk-21@gated-at.bofh.it> (permalink)
References <sLHup-7do-25@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Wed, 7 Dec 2016, Mel Gorman wrote:

> SLUB has been the default small kernel object allocator for quite some time
> but it is not universally used due to performance concerns and a reliance
> on high-order pages. The high-order concerns has two major components --

SLUB does not rely on high order pages. It falls back to lower order if
the higher orders are not available. Its a performance concern.

This is also an issue for various other kernel subsystems that really
would like to have larger contiguous memory area. We are often seeing
performance constraints due to the high number of 4k segments when doing
large scale block I/O f.e.

Otherwise I really like what I am seeing here.

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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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